Question 1
Why is the occurrence of pure metals in Earth's crust considered rare?
Question 2
What is the main product of the reaction when carbon reduces lead oxide?
Question 3
What is the chemical equation for the reduction of copper oxide using carbon?
Question 4
What is oxidized in the reaction between copper oxide and hydrogen?
Question 5
What happens to hydrogen in the reduction reaction with copper oxide?
Question 6
What is an example of a copper compound found in nature?
Question 7
Which chemical species is reduced in the reaction between copper oxide and carbon?
Question 8
Which of the following processes ruptures as part of the reduction method?
Question 9
What safety concern is associated with using hydrogen as a reducing agent?
Question 10
Which metal oxide does not react with carbon when heated?
Question 11
What is the byproduct of the reaction involving carbon and copper oxide?
Question 12
Which metals were key in early discoveries?
Question 13
In what forms is copper commonly found?
Question 14
In the reduction of copper oxide using carbon, what gas is produced?
Question 15
What is the chemical equation for the reduction of copper oxide using hydrogen?