[music] [music] Small drink means flameless Form of combustion Oxygen does not burn Oxygen burns, the lesson I will give is If you find it somewhere, let me know Sunil Sir, we like this explanation like you. Mil Hello My Dear Inquisitive Kids and Welcome to India's Largest and Most Impactful Live Online Tuning Platform that is physics wala so my dear Children, our sessions so far We have many chapters in them which One of those chemistry students in your Earth class NCERT and its 10 times in one shot We studied it 20 times at AB level and many more The misconception has been cleared, okay? Now it's time for another interesting chapter Read that it is combustion and flames in one Shot is okay so let's quickly finish this chapter If we start then Sunil sir what If you teach this chapter then kids will First of all we will talk about combustion and its okay about types related to this You have a terrible misconception that you are not aware of everything This is called burning and combustion No there are other types of combustion which I will tell you okay for small drinks It will be great fun to talk about it Later we will talk about fire and its types and the Ways to Extinguish Them Different Classes of fire which is a b c d e f okay in We are going to talk about everything ok and how to extinguish them We'll talk about that later too Sunil sir will talk about flame and its mechanism and it types okay and then after that Son we will talk about fuel and it ok about efficiency very good Sunil sir after that we will talk about harmful Products that are released on the burning of Fuels and their impact what happens Sunil sir ok let's go what will we talk about after that sunil sir A very interesting experiment of You will get to see That is Powdered Hydrocarbons Rapid Combustion I will tell you about this I will show you a very strange experiment ok let's start today's knowledge write turn on kids then start quickly Let's do it with a very interesting question that's here on your screen okay so pause the screen answer the question try to do it is it correct to say Burning of wood and combustion of wood is it Is it correct that I say burning of wood or If it is combustion of wood then is it correct That's absolutely correct there is no problem it's not here it's absolutely 100 percent what is it right but son just now I If you have asked a question then ask it after giving it some thought If it happens then hold your heart and sit tight, it will be a lot of fun you told me burning of wood and Combustion of wood is exactly the same, no problem no ok try the next question Who knows your thinking may change, is it correct Two to Burning of Incense Stick Screen pause try to answer that's right yes so kids many people have answered It will be yes but what is the correct answer No No it is not correct to say burning off Insik now your mind is totally shaken hey it is written in this book I have written in that refresher I have written So I will say this, it is written in the book Even if it is written in the refresher but it is wrong what is wrong i will tell you about it I will give you actual science and a correct one I'll give you the terminology here That is the correct terminology my brothers, it is ok Start it sir, it's a lot of fun Enjoy today's lecture which is going to create a ruckus. Let's start our knowledge Right to the Combustion and Its Types ok very good so sunil sir it is combustion what do you see son combustion what is your combustion what is it is nothing but a chemical reaction son it is a chemical reaction okay in which that if I speak substance specificly Const force Substance Const force means that substance that shows combustion that is non as a const bal substance to that const When force and substance react or interact it generates heat and light from oxygen Releases energy along with different products and that is basically known edge Kamban means such a chemical reaction what does chemical reaction mean Chemical reaction means process of Chemical Change is ok The Original in Chemical Change composition of a chemical substance or origin composition of a substance is altered to that chemical change is and the process a chemical change is a chemical Combustion is also a chemical reaction In which there is const force substance my dear When children interact with oxygen or reacts then that product or Look at these products, this is very important One product can also be made into more than one It can also be made the right way and apart from the Product and Products It Forms and It Reliable heat and light energy will now be seen I will play the game very carefully, I will use this light NCERT also wrote about energy It happened that flame and glow but you've never I haven't read it in much detail, I understand it no or did not think about it listen carefully bhaukaal If I create a ruckus here with this light energy If I talk on the basis then the first light is Energy Can Be There in the Form of Flames This is how you can get this flame The candle flame is visible in this way Your light energy may be fine too great good sir okay so this is when the flames if it will be in the format of then son you will They say burning, listen carefully if Your light energy is in the form of flames then you will call this age burning but If it is in the form of a glow i.e. Just shining, only in the form of glow contains light energy like in incense trick there's only glow here okay No such region has been created here what is happening is that it is known as a flame It is not getting created in this manner that is a glow then you are not supposed to use the Term burning Listen carefully Burning Use I don't want to do it, there is a specific term for it and that is known as small ring so if The light energy is in the form of glow then you won't call it as burning but it will be but it will be a small ring you understand it is so small Drink is a type of combustion where there is light Energy is in the form of glow is clear When you tell everyone here, Burning of incense is logically incorrect Any book, research paper, anywhere It is written in research papers then it is correct But it must be written somewhere in the book It is also written on it that it is wrong, small drink hoga small drinking means What does flameless form of combustion mean hai it means flameless form Off Are you able to understand the combustion? You can search for it Take this and you will get it that is flameless form of combustion which happens that is basically Non-flammable small drinks and non-flammable It is produced that is basically known as Burning My dear children understood this thing is ok ok so sir why is this flame produced happens when your substance is in vapor If any substance gets converted then your flame is making such a meaning even if it is in solid state even though it is liquid It is in a state where it is converting into vapor this will happen and because of vapor this region creates that is known as a flame ok so what have I taught you so far Kamban is a It is a chemical reaction in which the const force by interacting with substance oxygen creates a product or products together This light creates heat and light energy If the energy is in the form of flame then It will be called burning if it glows If it is in the format then drink it in small quantity will say meaning flameless form of Kamban and Why does a substance produce flame? because that substance converts into vapor It happens that's why sir look at its one diagram when your The concept will be clear right? You can see the one diagram You can represent it through circles can you look at any concept Let me draw a diagram of this, if I would say that this whole process is The whole circle represents this Combustion has two types Who can the inside represent? Suppose I make another circle and I will do this Suppose I wrote the whole circle Gave Burning is fine and this is the remaining part This remaining part, this one, I said this did you give me this i said small ring You can make this only if you have a lot of Understanding any concept will be dangerous then only you can make a venn diagram so When you have a very clear understanding You will make a diagram of the concepts You can explain any concept in science okay so combustion burning and small dying This means representing it with s if yes then represent it with s remove this there's no logic to this okay so here What I mean to say is that all of the All the burning is a subset of this isn't it Kamban If there is a big circle then all the Burning All Burning Is a Type of Kanban But all combustion is not burning because it what is the blue region small ring is ok If it is there then what is combustion, it is its biggest region This inside part is burning, this is the remaining part You can do part small ring inside like this the small ring and this blue one part burning but it should mean that There are two types of combustion, your burning and your small drink clear clear clear it's very good okay so I hope you guys who understands combustion very well Has anyone faced any problem here No Let's go ahead Come on Sunil sir let's go ahead now I will tell you more types of combs that and the types of combustion that are okay Types of combustion according to NCERT You should also read which ones are mentioned there is no problem so the first one which is ours type is that is basically known as rapid okay So what does Rapid Kamban tell us, son? What does rapid term tell you about anything? It should be done very intently and at a very fast speed Jaye that is basically known as rapid So if I said rapid combustion is happening So what happens in it is that the const force The substance is rapid here, lots of speed it reacts with oxygen and what does it produce products heat and light energy when ignited with External Sources You will get information regarding external sources. you will need to burn it, that is Rapid Combustion is fine like the LPG you use at home You burn liquefied petroleum gas it is like this, gas comes out like this then its Afterwards you make me do Sati, right? Then from that What happens to the ignition source? The fire started only when an external source was connected But it hits with very high speed so what is this Son, this is rapid combustion, we have set it on fire It started burning instantly, rapid combustion is good the second now what is the second one yours which is the second one that is basically known as spontaneous combustion What happens in spontaneous son const Force in the presence of substance oxygen It reacts and catches fire directly without External source means here you will get fire There will be no need to install it It is important without external source of Jai Shia speaks of ignition rest straight fire takes hold of it's okay like there are a lot of metals Yours is sodium, potassium, lithium If you keep them at room temperature moisture and I told you I taught this If you want to differentiate between metals and nonmetals then this In the presence of moisture and oxygen If they react and set things on fire then that is why Sodium potassium is added to kerosene Lithium is stored in paraffin wax. White phosphorus also reacts in the same way If it takes, then store it in water So these people do spontaneous combustion shows Meaning we did not burn any source I did not apply it, I got burnt automatically Did I come or not? Did you enjoy it or not? Here comes a great Explosive Combustion or Some people call it simply Explosion is one way you can call it that rapid combustion is this is a type of a Rapid Combustion Only having Const Bal The substance reacts rapidly but here The important thing on which you should focus In addition to heat and light energy sound is also produced and because of which What do we call this? We call it an explosion. so there's this extra thing here that If sound energy is also coming out through combustion It's very rapid, it's happening very intensely It is happening at a lot of speed, but at the same time Sound energy is also released when you lit from external source like in Diwali We don't light firecrackers, we light them quickly Burns with speed, has rubber cushion but causes explosion Why does that explosion happen so much? It's an interesting science, I'll teach you someday You will enjoy it, you will win my heart, you will say sir Your heart means you won my heart okay i have read it like this but now We are not discussing that but here you Understand that even in explosive combustion your There is very rapid combustion along with sound energy comes out it's fun this is okay So you must understand these three types of combustion. I have given you some examples of these here. I will give it to you quickly so that it looks like yours If I talk about burning of LPG it Your example will be rapid combustion Okay, if we talk about spontaneous combustion If we do then forest fires brother forest You don't need to light fires okay after that if we talk about that brother burning off now i use burning so For the sodium for the potassium for lithium because it produces flames What do we do Flame produce? What does Flame Light produce? energy is in the form of flames thou it is none as burning but if the light energy is in the form of glow then it is known age small ring dear children understood the fun come tell me sunil sir did you enjoy it okay clap speaking while playing and white Phosphorus is ok right? so this is very good what do you do this also Your spine shows nice combustion brother I do not have any external sources they set it on fire while sitting ok it is burning on its own, isn't it, without anyone What is happening in the world now brother? People get jealous, there must be some reason why here it seems like it's burning without any reason You see, this is strange, did you understand this? Now do not write potassium like this You must be thinking, what has Sir written? okay so this is potassium okay boy now Your burning of fire Burning of crackers is therefore called light energy it turns out okay i thought a lot I am using words, it's okay in this sound energy is also released so this is an Example of Explosive Explosion Explosive combustion or explosion is okay So we understood rapid combustion Spontaneously we understood We understood the explosive, sir, did you? gave me fun ok let's move on let's go Now this thing is clear to us here okay now we'll talk about fire here Her Types and the Ways to Extinguish Her Let them listen to me very carefully I am going to tell you important things okay Is First, let me tell you a small I ask many children questions in this I am confused so fire consumes oxygen it reproduces moves and dies so the the question is is fire a living thing or not okay so do you think fire is a What do you think is a living thing? Think about it, fire consumes oxygen Just like we consume oxygen it is for respiration, we take it There is oxygen brother, if you breathe then there is oxygen CO2 went in and came out and respiration is happening That is a chemical change inside the body Glucose is consuming oxygen brother It is breaking, it also reproduces Reproduction means humans also increase reproduce it ok Reproduction happens only then we are born It is happening, right? It happens to animals too. it happens in humans too, okay moves As it moves forward it releases oxygen it consumes and it reproduces moves from one place to another It keeps increasing it keeps increasing and it does like People die, and so does death Do you think this is a living thing? so the problem here is that this Not a Living Thing Why you can call anything a living thing You call any thing a living thing It is said when there are cells inside it okay living thing you can do anything then will say when there are cells inside it and inside the fire inside the fire no sales only a chemical reaction what is this son there is nothing inside it there are no sales okay it's just and It's just a chemical reaction, son. There are no sales in this, it's just You must understand that it is just a chemical reaction okay i got it, it's clear son even come on let's practice now why am I doing this I am getting it done, I will tell you right now, come quickly try this question you People try kids and through that I I will teach you the concept, you will enjoy it a lot is so which of the following principles Focus on Removing the Removable Fuel Source To extinguish the fire pause the screen try to answer it, see if it is ok Son, the correct answer is what is starvation why is it so i'll tell you right now You have the correct answer for this Starvation now Sunil sir this starvation What is it that we did not understand that you It was written starvation, mothering, cooling, smoke We did not understand anything, there was no problem no i will explain How do I explain to my son about the fire triangle? Whom should I explain to, son? Son, from the fire triangle There is one thing at each of the three angles of this triangle you write it down here you write it down here Write fuel here, heat, what is it I mean I can tell you perfectly well I will tell you and we will write it here If oxygen is sufficient then to sustain the fire Three important things are needed for this there's fuel heat and oxygen okay now your what is this fuel of yours, son, this It's fuel, okay what is this Sunil sir Son, this fuel is your construction power. What is the substance, son? This is your conscience force is substance okay what is your does it react with oxygen it's ok na and it's your production is ok Product or whatever you call it Products More Than One Plus Heat Plus I am listening to the light energy in great detail I will tell you very important things Your mind will spin, listen very carefully now I will tell you an important concept here What is the use of heat energy and what is the use of this heat What is the function of energy in both I'll tell you what the difference is ok so look if I have fuel and I have I have heat and I have oxygen The fire continues now there is fuel for it Brother, the const force will burn, which will be all the oxygen The product will interact with heat and light Energy will be good Great, now here comes an essential condition what is it that comes you Understand to start combustion to start combustion is ok is accept spontaneous means I am very I am telling you things very carefully Accept Spontaneous External Source of Ignition is now required this external source of Listen carefully to what the ignition will do External source of ignition is required Now see what happens, suppose I have to pay the fuel have to burn So what do I need for that? Oxygen I need heat and why do I need heat? Why should I worry about external source of ignition? I need this external source of ignition what will it do Increases increased temperature above ignition temperature Now here comes the fun game with full attention You will understand only when you listen to it, then accept that fuel is lying Isn't it lying here just like you Ignition source used i.e. matchstick If you assume it is put then what would the matchstick do? That matchstick gives it heat energy the temperature of that substance increases and As soon as the temperature of the substance Ignition temperature reaches above the Ignition temperature then it catches fire due to ignition Listen carefully to what temperature is Minimum Temperature Above Which Substance Catches Fire is okay, minimum temperature above which Everybody should catch fire at minimum temperature Which substance catches fire i'm done talking now If you did not listen carefully then you would have fuel I had read oxygen, did you read it first? External source of heat is accepted Leaving the spontaneous aside, you are external You will have to provide the source ignition you gave heat energy to the temperature now Substance reached ignition temperature It started burning but can you maintain continuous heat do you give or not do you do you give continuous heat, otherwise it How does a whole thing burn on its own? We took the paper and burnt it from below Remove the matchstick and the entire paper burns why did it burn completely It burns because this reaction contains heat Energy is released, what is released is heat energy as soon as this heat energy is released this heat Energy increased temperature above ignition temperature listen carefully son you heat it once son Source of given temperature ignition temperature The substance above caught fire now that Const force substance i.e. the fuel which is The product will react with oxygen and heat And this heat energy will convert light energy into something else It will increase the temperature and all that will start burning. It will continue and it will burn again Products will become heat energy and light energy That will generate more heat energy from all that Doing this will increase the temperature While doing this the whole paper burnt okay so what is the use of heat energy or what is the work of heat Increases temperature above ignition Temperature is OK Ignition Temperature okay and what is oxygen the work of oxygen It's very simple, oxygen doesn't burn Oxygen burns oxygen is not blanket but A supporter of combustion does not burn, it burns yes son it is there so what is oxygen It is a supporter of combustion, it protects others from burning helps in son is ok so what are the three most important things What happened? Fuel happened, heat happened and oxygen happened. If you say bye bye to even one of these If you say tata your fire will be extinguished stop It will happen if you say goodbye to oxygen If he says bye then what will we say to him? Attention listen from if you If you do anything to oxygen they will say smudging If you want to lower the heat temperature If you try to do it, they will say cooling is ok yes let's suppose if you did cooling okay so this means temperature decreases below ignition temperature, this is That means if you tried to cool it down, If you try, check the ignition temperature You brought it down from the not this heat energy that is being released It was there in the cycle, we are talking about it here But I wrote it correctly The second thing is if you remove the oxygen If you do it then what will you tell him what will the smd ring say if you You would have removed it if you had removed the oxygen If you have removed oxygen so what would you say to this what would you say to this the smd ring is ok and if you have changed the fuel removed if the fuel is removed So I will call it Starvation means starvation in a way In a way, someone has to starve, right? You can also call it starvation, so now that is just fuel If he doesn't survive what will you do brother burn him Who knows, now the kids say it's okay Suppose an example of starvation is that Your fire is caused by electricity You turn off the electric supply and the fuel You stopped it and I got starvation If there is less fuel, it will burn if there is no fuel If you remove oxygen, will the smudging ring and If you reduce the heat i.e. temperature bring up the ignition temperature that is basically non edge cooling So look son what is actually happening listen carefully to your fuel here it got oxygen the fuel got oxygen And did you initially give him heat? initially I gave it heat so the fuel I got oxygen, you gave me heat energy, okay? I'll make it a little bigger and write it down for you guys so that you can understand it better Let me come to what I am trying to say, okay it is, let's write it here, heat is, let's write it here If there is oxygen then I had fuel, I had oxygen I gave heat energy to The temperature should go beyond the ignition temperature now This fuel will burn and release heat energy. heat energy from the remaining fuel it will burn it will burn it will burn It will keep burning, it will keep burning, then here their what's going on in the middle son a chain Chain reaction means it happens automatically Well, you did strike a match once, right? It keeps burning on the paper by itself it keeps burning it keeps burning it keeps burning you have to apply the matchstick again and again once the temperature ignition is set Everyone's breathing oxygen level has gone above the temperature interacted with the product create the product there can be more than one is heat energy light energy now the heat Energy is derived from a separate substance temperature above the ignition temperature I will do it like this, keep doing it, keep doing it The entire paper burns while doing this process It is said that self sustaining means automatically it is sustaining itself okay so here Some educated people call it Fire Tetra It is also said that hadron means fuel is needed, heat We need oxygen and a chain in between them There is a reaction that is happening on its own is that fire tetra Drone, another knowledgeable thing, what did I say Fire Tetra hedron is ok i hope i have given you a lot If the geographical knowledge has been given here then If Tata Sea says bye bye to fuel If you say goodbye to oxygen starvation then If we call smudging and heat as temperature lowered down below ignition temperature We will say that he understood cooling further Come on let's see different types of fires You are different for those who are with you what type of extinguishers do you use NCERT is not providing extra knowledge So the category of fires is Class A fire that is, paper which is there or wood which is there or Then your clothes which are on the clothes Everything in this class catches fire Class A fires are as many as Class B fires you have flammable or inflammable liquids Flammable and inflammable mean the same thing it happens ok Is Flammable or inflammable same OK is easy cache fire is ok or you can say take it Ignition is temporary hence quick fire If you catch it then it is like a class B fire Petrol oil etc. catches fire and your Class B is a fire, class fire means your Which are the flammable gases, son? fire caused by flammable gases that is class c fire class d fire your The reactive metals are sodium, potassium Magnesium This is your class D fires Electrical Fires Your Class C Fires and f or k fire it's because of the uk us If the name is from F and K then cooking oil and The fire caused by fate is something of yours The category is A B CD E F or you can say so if we can then it is the first thing that we have Where can we use water? You can use water only and only with paper wood or Will you use petrol oil to put out cloth fire? Methane Then Reactive Metals Electrical You will not use fire anywhere behind them what is the logic brother petrol oil or else Density of methane is less than that of water If you put them in the water they will float So they will keep burning, what does that mean to them They will keep burning at the top, it doesn't matter to them you don't have to use water anymore If you pour water on an electrical fire you're going to get a shock right, right, you guys all these things here magnesium sodium If you give it to me, brother, the fire will flare up even more. Brother, pour more water, pour more and we burn Look, you don't have to do all this, it's okay to cook Same case will happen in case of oil fight Density is low, will float up and fire If it keeps on hurting then that's why only you can drink water and fire of paper, wood, or cloth, i.e. You will use it for Class A fires not used anywhere else after that you can use it fm this is collider solution ok Here, colloid solution containing gas There is a disperse phase, right, and dispersion medium you have liquid I will teach it in class ninth, okay then this Your Class A fire and Class B fire You can use carbon in this way We can also use dioxide Very commonly used fire extinguisher You will not use this in class A Where will you use class B and class E You can use this inside a fire Karoge Dry Powders Dry Powders which ones would be like nahco3 is your dry powder Baking Soda you can divide this into Class A Class B Class C You can use it inside the fire after that special dry powders that is if I should I say na2 co3 means sodium carbonate sodium Chloride is only class D are used carefully for fire listen carefully understand it is ok wet chemicals ok like potassium carbonate etc If it is gone then it is only and only for your cooking oil and are used for gas fires okay so i hope what i told you is You must have gained extra knowledge Let me ask you some questions on the basis of this I will clear the concept more clearly dear children with the true attention of my heart We will see this, okay son, let me move ahead, son go ahead dear children come on look let's practice son so dear Children solve this question with all their heart will do the chach of the following is the best Extinguisher to Extinguish Electrical and Gasoline Fires Screens pause trying to answer do look now you water I just told you you will not use water if you believe Guess which fire do you use? ok in electrical if it is there then what will happen water can conduct Electricity is right or pure water? If your normal water heater and conductor off Electricity but use di electrolyte etc then it's a good conductor of Electricity is ok so Conduct or Conductor and Can Kill the Person Dowsing Fire okay then this should be given to the one who is extinguishing the fire it will extinguish his life it will extinguish it alright son, you don't have to use water now Sunil sir what if you don't want to use water can see water electrical and Gasoline will not be used in gasoline fires why won't I use you now It was told that gasoline means is it petrol or should you talk about oil You also say petrol is right, so their what is density is less than water density less than water and floats on water due to its density is lower than the water then it floats on the water it is there and it keeps burning continuously okay So you can't even use water, brother. you can't use water ho so watch of the following is the best Extinguisher to Extinguish Electrical and Gasoline Fires You can use water for electrical fires. You will not do it because water is not conductive Electricity or water from some other source it may be ok i mean if rain water If he is, he can be a very good conductor Teff Water Contains Aged Dissolved Electrolytes So he is a very good conductor, you went to extinguish him The guy who was downing got a shock What does gasoline fires mean? Gasoline or Oil has a lower density than water It will float, the fire will not be extinguished, it is fine with foam what's inside remember the gas disperses in The liquid coming here is water, that is a the liquid is coming out in a way you can see it now Please avoid it, you cannot use carbon dioxide and baking soda baking soda what about you baking soda was your dry powder so dry You should not use powders for electric purposes You can do their work only by doing other action OK it needs heat to break down this carbon What will baking soda do to dioxide what will it do you know baking soda will break down Sodia Soda means Sodium Carbonate Soda A will create plus co2 plus h2 will create This is also carbon dioxide but the problem is this that it won't get this much heat from here that it breaks down into carbon dioxide What will happen from this Sunil sir, see Carbon What will happen with dioxide, I have told you here It was also told that this is carbon dioxide okay what will carbon dioxide do no what does carbon dioxide do to you What does carbon dioxide smoldering do? Son smells carbon dioxide what happens to your smelling now Brother, what does carbon dioxide do? Mothering means displacing oxygen How do you see if there is a fire somewhere? into carbon dioxide and oxygen what if we released carbon dioxide Carbon dioxide is heavier than that Oxygen will settle down, there is oxygen on top The mass of carbon dioxide is less, isn't it? If it is more it will stay below oxygen will stay above If she stays then he will displace her If you have intentionally put carbon somewhere dioxide is released then displaces o2 because mass of co2 is greater give o2 and what will it do to that basically the fuel that is burning from there It will drive it away that is why we use carbon You will use dioxide gas You will say sir that baking soda is also carbon Dioxide will be produced on thermal decomposition but here it You cannot do this through electricity You will not get sufficient heat in the amount that it breaks down to produce CO2 and then that's instead of fire okay so i hope you like this I have clarified it very well I have given it, son, let's move ahead, it is the correct answer carbon dioxide Let's move ahead on which of the following Principles of Sodium Bicarbonate Work which principle to extinguish fire Uses pause screen answer look this is your baking soda okay You will say Sunil Sir, you just said carbon dioxide there will be smudge there will be absolutely smudge then why not baking soda Son, enough amount of heat is needed to break for when you give it will make you What will soda ash make? Soda ash will give I will also write the formula for your baking Soda is its common name that is baking The chemical name of soda is sodium bicarbonate or sodium hydrogen carbonate soda a The chemical name is sodium carbonate formula it is na2 co3 plus what will it release Son, this will remove carbon along with it dioxide and water will listen carefully what will remove carbon dioxide and son It will remove water and carbon dioxide what does carbon dioxide do it does this what does your smothering do yes Sunil sir this does mothering carbon dioxide gas is heavy around the fuel Displace any oxygen that is there and drive it away You will tell her that I am heavier than you, son Ja smothering is done ok what will happen mothering is ok let's go among the following can Be used to extinguish large fires due to Magnesium metal answer carefully If I am asking a question then it is like this question normal will not be ok now let's look at many sources When you go, it will be written that you should use the soil You can condition the soil for use listen carefully that's why I asked the question First of all, let me tell you why can't you use water can not be used okay now see what is it Suppose magnesium metal is burning fine have you seen magnesium metal I poured water on it and it turned it into magnesium oxide of plus he made hydrogen gas plus it made the heat okay it will be that this heat energy is its the temperature of hydrogen will increase its self ignition i.e. auto The ignition will take off above the temp What will happen if hydrogen catches fire? catches fire so you went to put out the fire that had gone to increase the fire of magnesium metal come on pour water pour water pour water oh brother Hydrogen will be released and a dangerous explosion will occur Const gas second carbon dioxide brother carbon I will use dioxide gas and do something it won't happen as soon as you take it Magnesium plus you will take carbon dioxide gas that became edge plus carbon will give okay he will make edge plus carbon Balancing yourself is not balancing the equation I am not even balancing your course that's why I'm not balancing it okay No, let's talk about carbon after that dioxide cannot be used of sand Let's talk about the conditions for using the road that if the amount of Sand Yours Greater Than Magnesium if yes then can be It is okay to use if your amount of cents is magnesium is much more than the metal then You can use the soil but if it is equal If your amount of sand is equal to magnesium metal then it is done problem for you because what would be the problem because the problem would be that magnesium What will Edge do by reacting with A2? It will make this but it will be very big here What a powerful explosion will happen here son There will be a very powerful explosion and in this case The fire will continue, the fire will be Continued okay so sir if I put soil What will happen if magnesium metal extinguishes the fire? The fire that is yours won't go away, son. And there will be an explosion if used in equal amounts If it is in large amount then it will be extinguished less if it is in amount it is in equal amount then that's it If it is done then there will be a terrible explosion That's why son, you don't consider the soil as advisable I would tell you not to even use soil Do not use carbon dioxide either And don't use water either, you use it Special Dry Powders Which Powders Special Dry powders, you can use these You won't find this knowledge anywhere, son. You can find it on Physics wala, just search it You are not going to get it anywhere, okay so correct The answer will be our sodium chloride Dear children, let's move forward with all our heart Son we will talk about flame and its mechanism and I hope you know about her types son I am able to understand everything till here, son. I am enjoying it, play it louder Bar clap Ok, it's okay, we have to keep drinking water No problem son, I understand this much it's happening let's move on so my son this is the first question for him I want to ask you if you know what a candle is Why does the flame of a candle only go upwards? The flame may go down or nowhere at all It can go but why does it always go up? hey Sunil sir what is the logic that this always It is important to know us in this I want to see Son, listen carefully to this thing here. This blue molecule is representing There is cold air the relatively colder air and it will Hot air is represented here You should understand this, you can understand these two codings understand now what happened son suppose that your You lit the candle near it What were the particles here in the cold air were available okay now what will happen is that here But due to heat transfer their temperature if it increases then what will be your molecule This part of the air will go basically what will happen will be hot and this one You already had a cold part, now it would have happened what is it son in hot air you pay attention to this Understand from this what exactly happens in hot air What should you do if the air is normal? If you supply heat to it, it Hot air is formed, isn't it, son, be careful Listen, I will tell you this very basic thing heat transfer means heat on this If transfer has taken place then the temperature of the air It will increase and hot air will form now Is that the kinetic energy which is first carefully Listen to what increases son's kinetic energy which is listening carefully to the particles what is kinetic energy I will tell you the kinetic energy of particles Increased kinetic energy is the energy which is related to the motion of a substance yes it is ok like the gas which is air The particles inside it vibrate in such a way that You can show further translational motion like this can that mean it is like linear motion Curvy linear motion becomes rotational motion show can do the moving So the energy that we are talking about is kinetic We are talking about energy, meaning particles moving right now like if I move I am in motion so the energy Associated is known as kinetic energy to heat transferred to hot air means inside it the kinetic energy of particles increased and When kinetic energy increases, the temperature Listening carefully increases further and I will make it clear through kinetic energy only The temperature will increase due to the kinetic energy Energy does not increase, temperature has increased now this It happens due to temperature and kinetic energy What is it? Look, if the kinetic energy increases I mean their movement, their speed, What will happen if the number increases, son? of particles in a particular volume There will be number of particles in unit volume at what will they do to you we will decree what does it mean brother kinetic energy if their motion Whatever it is, it has increased in such a volume that I I was seeing that the kinetic energy was less earlier Many particles had kinetic energy has increased go out from that volume fast fast fast fast move from particular area If you are doing this then the kinetic energy will increase Number of particles per unit volume decreases and number of particles per unit volume or mass per unit volume per unit mass volume in number of particles of some mass then mass per unit volume is non a Density means what will be its density decrease If it goes up then the density of hot air decreases and the density of cold air what is density it is more Density is more than hot air, hey, this thing Do you understand this logic of yours? that's why hot air goes up people I asked you, hot air goes up Ask why she goes, that is why she goes because its density is low and less dense things will go up with higher density If the denser things stay down then hot air has less density so it goes up Cold air has higher density so it remains below and the density is less and more why is it because you supplied the heat hot air made kinetic energy of particle It is high which means randomness speed is very high here If you are moving there then the number of particles The pert volume is low and its density is low The density will be high because kinetic The energy of the particles will be less there If cold air stays below then hot air stays above As soon as its kinetic energy is here Large particles move above the hot air the density of cold air will decrease They are particles so they will stay below now What would happen son, suppose the flame was like this okay now just like that son here listen carefully these particles are hot the air ones have gone up okay they have gone up right will the cold air rush from here Cold air will rush inside on one side why do you know because the pressure difference will it be created, will it become high pressure will be there and it will become low pressure Because the air nearby here was It went up and now there is a pressure difference It has been created where there is no air, so air It will come in from outside and then it will be hot then it will go up then the wind will come then it will it will be hot then it will go up okay so this The cyclic process is now created as above It will cool down and then it will come down It will come here, get hot, and then go up again It will cool down and come down while doing this Doing this again and again, going round and round it rotates and the direction of the flame is You get to see something like this okay so as soon as he had air Its temperature increased and the hot air density increased If it reduces then the air nearby will It is available, she will tell me to take it with high pressure pressure here concentration is less fill here then it will get hot then it will go up now The air which was heated up above cools down again basically it is like this round and round hole below In the language of chemistry or normal language I say conve current set up This is because your candle flame will go away that he goes up to you it is clear clear clear oh do you understand This is what your Bhaakaal level is talking about There was an explanation, let's move on Sir now let's talk about Jonas of Candle Flame that the explanation that I will give will not be found anywhere If you get it then tell me Sunil sir We found an explanation like yours somewhere but ok If so, we will talk about the first thing carefully which wax which wax was paraffin wax was yours Pass that you use to make candles yes we were talking about petroleum products Inside I had told you about paraffin wax You get to see the candle, it's yours Do you have a paraffin wax candle nearby? There is lot of available great see now Son as soon as you put this wax on it it's this wick is attached okay now like so what do you do you light the wick If yes, then wax is your first priority Is Melt is fine and what does it do by melting? This one here will melt the wax The wax below will start now what will happen from here son as soon as you do this There was some wax on the wick, it got burnt now The heat energy from here is What will the wax do to anyone who comes in contact with it? what will you do to it, it will melt it, right? If the temperature increases it will melt If it happens it will melt and rise, why is this so why does it rise up attention First of all you took the sesame seed of the meat You lit the candle, the wick burned around it All the wax in it will melt because temperature is the heat energy you gave He is burning up in heat energy What will happen if the things around you melt? It will seem okay, the waste around will melt Now whatever she will melt, she will do it slowly What does it do? It melts from here and goes up. what does it do it melts and goes up Do you know why she does rises up due to capillary action which action son capillary Action which action son capillary action now you What would you say is capillary action? so the fluid which is which is fluid Fluid Travel Upwards Against Gravity Through the Narrows What does path mean? If the path is very thin then The fluid is against the gravity of yours moves upwards as the wick is up neither what is there in it that which is of wax The welt is waxing slowly slowly melted is going up and what is she doing Slowly slowly slowly the melted is going up Slowly, slowly, slowly it is going up Known as a capillary action, due to this action Water goes inside the plants through your roots is that is known as capillary action and it is very very important So the paraffin wax candle we had I burnt it, the wax around it burnt first And rise up due to the capillary action now what would have happened what happens is you know that as soon as If it burns then it will be something like this The structure will create a flame like this The structure will now be made in this manner There are different colors here because of the structure Let's become the Jonas, let's see what happens to everyone What is outside is your zone of complete combustion It happens, okay, and we call it VE. I l well also say what do you say well Okay, now you will see this zone very rarely. yes it is there below you will see more color here You will see more blue here It is more visible here, right? What is very high up here is less visible Here you'll find blue blue blue blue You will see more up top, you will see less now This is the outermost zone that is known as the outer zone of complete combustion which It is blue in colour, what is meditation in it Listen to me, what happens in this, look son What is your wax made of? Beta hydrocarbons means hydrogen and It is made of carbon and when it is shown in Kamban show means it is interacting with oxygen so what will it make of carbon It will interact with oxygen and create carbon dioxide Hydrogen is formed by interaction with oxygen will give your water is ok di hydrogen monoxide It is said that the chemical formula of water is plus The son will bring out the heat and the son will bring out the plus Light energy and light energy will be blue color in the format of when your what is here This is the condition of complete combustion Let us understand the meaning of complete combustion Combustion means all the carbon that is yours gets converted into carbon dioxide gaya that is known as complete combustion pura ka all the carbon into carbon dioxide Anyone has been converted Unwanted here you will find the outer most zone of blue colour You will get Sunil Sir's complete combustion here Why does it happen because there is sufficient here amount of oxygen is sufficient amount of Oxygen is available, okay? because of sufficient amount of oxygen Correct it is very good so if there is sufficient amount of Oxygen Available If it happens then it will be basically a complete combustion show Now you will say sir here also there is oxygen son what is there here that There is a structure here, the reason for this structure So here you can say that here is lack of Oxygen and what does this lack of oxygen do Lack of oxygen in this zone Lack of oxygen in this zone Your partial combustion due to off oxygen It happens that complete combustion cannot happen, see Amount of oxygen accessed outside It is present so there should be complete combustion goes away and a blue coloured frame comes out There is a lack of oxygen in the middle of the flame The structure of is made such that in the middle there is a lack of oxygen and because of that The hydrocarbon of your okay your hydrocarbon is son its complete combustion is not ok What does it mean that your product Carbon dioxide will be formed and H2O will be formed And some carbon will also be formed, you understand here yes, that means hydrocarbon is there in between as well, right? because it will melt and then turn into vapor do you understand it will convert, it will melt will do okay and and then in the vapor will convert it into vapor So after this we say that burning will happen That's why you see the flame so much I am understanding it we lit it by melting wax Slowly, slowly, the further is going up The temperature will increase and it will convert into vapor will go and this combustion will show here only then So this flame is generated second thing outside There is sufficient amount of oxygen because The flame structure is formed in this way is caused by the convection current which The flame is something like this now it is formed There is a sufficient amount of oxygen outside Complete combustion takes place so we get blue Flames of color are visible but If there is lack of oxygen inside then It's a hydrocarbon, it breaks down, right? carbon reacts with oxygen dioxide and water vapour but some carbon remains unburnt this one The carbon is yours, how it is, it is yours Unburnt carbon is unburnt so what about this it gets hot okay and then it basically glows it does okay these can be called that is also known age incus understand the meaning of incus that when you The temperature of something increased a lot If we give it then it will emit light, then this discord particles that are very hot there are and they glow and that is known age Incas so this glow is fine isn't it is in the form of yellow colour then this yellow colour The glow of the import do they import this Characteristic yellow color to the flame ok and finally finally from here it comes out in the form of suit that is unburnt carbon okay so What did I say that as soon as I first I lit it up as soon as I saw it here pe heat the external source of heat the to He set the temperature above the ignition temperature The increased amount of wax melted and the vapors then this flame generation happened What will happen now, the temperature will increase What is wax? It will melt and rise. will go up due to the capillary action then the hydrocarbon which is Now this is a flame structure, so the people outside What will be the completion of hydrocarbons in The whole carbon will be burnt dioxide will convert into water vapor Heat and light energy will be generated in blue color There will be light of it, it will be called well in the middle There is a lack of oxygen in the zone not all of the hydrocarbon is converted If I find it then CO2 and H2O will remain together unbroken Carbon will also remain if the temperature is very high If it is high then what will it do, it will glow yellow color de dega and finally it will leave unburnt carbon that is known as soot and There is absolutely no combustion inside If it doesn't happen then what do we basically call it here are the zones of innermost zones of Unbent wax vapors: These are black in colour or there is no oxygen at all, then this what do we call this what do we call this yes it is dark zone, what should we do about it We call it the dark zone It is said that the dark zone is yellow and then blue in color that there is a zone okay so son I have done a lot I have read this to you in more detail. Hope you got this clear in a very good way It must have happened, let's move on quickly now Let's practice some questions quickly pause this question screen try to answer the question Identification Let's see which combustion will happen here z this is the cause of partial combustion Which will be the cause of complete combustion? This one will be your complete combustion there will be people This one will become a zone of no combustion where there is no combustion, it is dark zone will happen and what will happen to you partial one or we can say that This will be your zone of incomplete combustion The correct answer to this question is that is it okay Let's move forward hey quickly say cha among the following doesn't Burn with the Blue Flame in the Presence of An addictive amount of oxygen screen pause Answer it and see what happens if you If you give addicted amount of oxygen then anyone If there is substance then it will be from blue colour flame It burns water, its characteristic is that a blue colored flame is generated when there is a complete combustion theek hai Even in the case of saturated hydrocarbons If we talk then blue color flame unsaturated hydrocarbons give In case your yellow color flame comes okay that's why incomplete kanban happens But no matter how much amount of excess you put on the candle Please turn off the oxygen here is the wrong candle what is it because of the candle's flame okay because of the structure of flame so What happens due to the structure of flame There is lack of oxygen which causes the flame to in the middle because of the structure you have Proper amount of oxygen is not reaching raha hai and thatchi no this is not a question statement Question statement is your match the following Match The Following okay match it carefully quickly quickly Quickly pause the screen and match See the hottest Part moderately hot least hot so son who The outer most zone has a temperature The most common is blue colour so the outer most zone is the hottest part basically blue in colour and it is the outer Most people of complete combustion a3x a3x a3x a3x so this won't happen this will won't happen a3x and a3x is ok moderately hot let's talk about moderately hot okay so what will happen to you middle people of the Partial combustion will happen that is yellow to b to j b2 j this b2 j this is wrong correct answer this is what will happen okay and what is the least mo zone that is black in color to correct This will be the answer we have, okay, understand I am coming, everybody is understanding it okay the outer most part is blue in colour that is also known as well inner most jane your jo The dark zone is black in color And then whatever is in between that is known as the person of partial or incomplete combustion that is yellow in Let's go color, you have got the correct answer now Look, I will also tell you about types of flame Let me see if your combustion is incomplete what is happening is it incomplete or partial combustion If it happens then whatever color your flame will be, son what will he come he will come yellow and why yellow It will come because you have hot un bunt carbon particles have they will import this yellow color to the Flame Hot Unbent Carbon Particles Hot Unbonded Carbon Particles because of ink sense because of in can dissent import the yellow colour to the flame and What if you have complete combustion will be complete kanban meaning the whole thing convert carbon to carbon dioxide Not even in carbon monoxide Complete Kamban means in monoxide is converted into carbon dioxide Here you will have blue color of flame OK, now here's an important thing to say on the basis of amount of light produced So if the light is of blue colour then we will call it What do you say non luminous? What do you say non Luminous non luminous means does not produce enough light now you will say sir what does it mean what is it son do one thing Just close everything inside the kitchen to light the gas, I told mummy to light the gas will give and see how much it will observe in the room If there is light then there won't be that much light, you have gas Even if there is a blue coloured flame burning, it is completely The whole kitchen will not shine so doesn't produce inner flight ts we call this non luminous flame but what do we know about it Luminous flame says if you Candle in the same room Candle inside the same kitchen If you light it, it will fill the whole room with light will produce enough light so that's why this What does Luminous Flame say? Produce Enough the light is ok i hope i told you all this I have explained everything here I could give you extra knowledge hmm let's move on to the next topic Let's talk about fuel and its efficiency ok till here all the extra knowledge I am understanding it, I am enjoying it, it has come Come here son, we will talk about what Talking about the calorific value of cheese what is the calorific value Calorific value is that it is a measuring methodically how much amount of Heat energy will be generated when you burn 1 kg burn off the fuel g suppose that told me that's 10 fuels I have right now I want to tell you that the highest amount of Who produces heat energy so that it can be The best fuel has become more Calorific value of 1 kg of fuel If I am burning it it will heat up so much If it generates energy then I can get a lot of benefit from it. I can get any machine to do the work, right? I can get it moved So I took reference brother, I took 10 things This is what it is doing in 1 kilogram he is doing so much he is doing so much he is doing so much he is doing so much he is doing so much okay So this is called my calorific value and it is also known as the heat of combustion Meaning the heat generated after combustion process Energy is running out what is this what is its calorific value We measure kilojoules per kilogram I measure things in kilo joules in kilograms and if you observe So which one has the highest calorific value? is your hydrogen Highest value of calorific value that This means 50,000 kilojoules per kilogram If you burn 1 kilogram of hydrogen So that energy of 5 lakh kilo joules It will produce this means ok now i understand the rest of the fuels too I have given you the range here I have given this because of their quality It depends, now suppose there is coal then Depends on the quality of coal through a range This range is given because it depends on the quality of coal i told you Who will generate the most heat for you? Anthra Site Generate It will do it right brother, more than lignite Anthra site more than biton minus and biton So the range depends on the quality of your coal It depends so here you will get the range I hope you get to see this The data is understood it's ok just like kerosene is petrol 45000 for kerosene 45000 for diesel 45000 50000 of Methane 50000 of CNG 50000 of LPG 55000 In this way you will get all the calories values given is screen okay very good let's move ahead Practice quickly moving the screen will pause and answer in villages People use wood as fuel because brothers are in the village You must have seen wood being used as an edge why use fuel it is written it is considered to be an ideal fuel oh wow ideal fuel kya First let's see what is the ideal fuel Explain what is ideal fuel First of all, ideal means that the most Bhukali is the most dangerous No Paul can be ideal like anyone in this world Fuel may not be the ideal fuel Brother, you are wishing that all Characteristics should come within the same fuel So that ideal fuel is not possible that is not possible to use ideal fuel what would have meant let's assume that first of all It is economical and very cheap yes easily available now if your ideal fuel is Is all fuel easily available like this That is why I am saying that any fuel of yours It cannot be ideal that brother he is economical It should be cheap and easily available It should also have high calorific value yes it is ok and environment friendly too yes this means that all four If a characteristic is present inside a thing then a Tell me is there anything good inside you there are some things evil inside you The evil is within me, whatever my quality is The quality which you have cannot be present inside you The meaning of ideal cannot exist inside me now There might be nothing lacking in anyone It is the best so that's why I wrote it brother It is cheap and also easily available It is also cheaper and does not harm the environment There is no loss and its value also has high calorific value it is possible brother, the wood is in the village so It is used because it is cheap It is available, it is economical, what is it It is economical and available cheaply is Economical and that is easily available but Is it environment friendly? fire is there otherwise it is inside everybody It is impossible to have all the characteristics So the ideal fuel cannot be yours If this statement of yours is also wrong then What is the logic behind using wood, brother? It is cheap and easily available So quickly watch this choose the Incorrect statement from the following a good fuel is one of the most Available in produces large amount of heat ch leaves behind many undesirables Substances that burn easily in air at moderate temperatures rate what is a good fuel ok A good fuel is one that is easily is available from lately available yes that produces large amount of heat that Means high calorific value yes tea leaves undesirable all no brother our environment You don't want to spoil the wrong one Air at moderate rate is absolutely correct no problem it was wrong correct it Telling the answer C is incorrect Now last topic was harmful product released on the burning of pews ok let's go Let's see quickly what product I will release you first I told you that the carbon particles are your Coming out from incomplete combustion Are Incomplete combustion or what you people call it Partial combustion comes out through it okay same carbon monoxide too Reasons for your partial or incomplete kanban If there is conflict with carbon particles What happens is that asthma can occur okay and what is carbon monoxide Son, this is your poison ass gas, what is it Son, poison or gas, I will tell you all this I will teach you everything again in detail. When I tell you about pollution of air and water So here I will teach you these things and I will teach you in more detail about poison as It is a gas now it is poison as a gas so son What will happen, why did I say this poison gas The hemoglobin in your body, son The oxygen carrier that hemoglobin has Peacock Affinity More Affinity for carbon monoxide than oxygen what does it mean that if in the same amount Oxygen and carbon monoxide are available So there is more hemoglobin in it Affinity it's more affinity for carbon monoxide than oxygen because with it One What makes carbs complexion hemoglobin and this is what your that is more Stable More Stable Complexion What I mean by saying fed with oxygen is that The hemoglobin that carries oxygen Complexed Carbohydrate Hemoglobin That's why hemoglobin wants me and I will be more stable if I put carbon take monoxide into your body I will take it in my blood I will take it in my blood If I take it in my blood, I will take oxygen from it there is a shortage of okay and oxygen what happens when there is a shortage okay it's lack of Oxygen and what happens with this, what happens with this If you have hypochloremic deficiency, you should take a The condition will be that it is basically known age Hypochloremic asthma carbon Monoxide may come out of your body incomplete or partial combustion and because of this you this is called poison as gas because your The haemoglobin inside is like a peacock peacock Affinity for Carbon Monoxide Dehydration Oxygen will dissolve carbon If monoxide is in the blood then carbon dioxide Hemoglobin will cause lack of oxygen will go hypochloremic in the next chapter sir Son, I will teach you this in the next chapter I am fine so I hope son I told you The whole chapter is very detailed I have taught you, did I miss out on even one thing You have not gone through the chapter carefully Read this as much as I taught the content The level is many times higher than your NCERT. of and it is also sufficient for you, you can Also ask me if you have any problem she won't come here, she won't come now what else is it Sunil sir and this is what do you think Solid Hydrocarbons Show Rapid Combustion Many children feel that I am asking questions are solid hydrocarbons which are Not Rapid what is the correct answer jalte that they are jealous but I will tell you this Now I will show you how, I will show you experimentally So please look at the experiment and enjoy it you will enjoy it a lot So until then thank you very much Enjoy the experiment thoroughly [music]