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Understanding Liquid States: MCQs and Insights

May 21, 2025

Liquid States MCQ [Free PDF] - Objective Question Answer for Liquid States Quiz

Introduction

  • A collection of Multiple Choice Questions (MCQs) focusing on the properties and facts about liquids.
  • Aimed at helping aspirants understand and practice questions that can be asked about liquid states.

Key Concepts on Liquid States

  • Properties of Liquids: Definite volume, no definite shape, possess viscosity and surface tension.
  • Intermolecular Forces: Stronger in liquids compared to gases, making them an intermediary state between solids and gases.
  • Effect of Temperature: Understanding the impact of temperature changes on the properties of liquids, including viscosity and surface tension.

Sample Questions and Detailed Solutions

Question 1

  • Scenario: Calculate surface tension of a stearic acid film.
  • Given: Work needed to decrease coverage by 1 cm² is 25.0 x 10⁻⁷ J.
  • Solution: Surface tension of the film calculated as 0.047 N/m.

Question 2

  • Query: Substance that takes the shape of a container.
  • Options:
    1. Tungsten
    2. Iron
    3. Petrol
    4. Paper
  • Answer: Petrol
  • Explanation: Petrol, being a liquid, adapts to the shape of the container.

Question 3

  • Query: Characteristics of solids not applicable.
  • Options:
    1. High Rigidity
    2. Regular Shape
    3. High compressibility
    4. More than one of the above
  • Answer: High compressibility
  • Explanation: Solids do not compress easily.

Question 4

  • Query: Factor affecting boiling point increase.
  • Options:
    1. Decreasing pressure
    2. Increasing pressure
    3. Increasing weight
  • Answer: Increasing the pressure
  • Explanation: Higher pressure increases the energy required for molecules to escape the liquid phase.

Question 5

  • Query: Substance conforming to container shape.
  • Options:
    1. Solid
    2. Liquid
    3. All correct
  • Answer: Liquid

Additional Questions

Question 6

  • Query: Reason for lower boiling point at high altitudes.
  • Answer: Lower air pressure

Question 7

  • Query: Metal not reacting with oxygen at high temperature.
  • Answer: Silver

Question 8

  • Query: Best conductor of heat among liquids.
  • Answer: Mercury

Question 9

  • Query: Conversion from liquid to gas.
  • Answer: Evaporation

Question 10

  • Query: Maximum permissible turbidity for potable water as per BIS.
  • Answer: 5 NTU

Question 11

  • Query: Energy absorption during phase change from ice to water.
  • Answer: Heat is absorbed

Question 12

  • Query: Physical state of water at 12°C.
  • Answer: Liquid

Question 13

  • Query: Measure of liquid clarity.
  • Answer: Turbidity

Question 14

  • Query: Purpose of salt in ice creams.
  • Answer: Salt decreases the melting point

Question 15

  • Query: Method not useful in separating chalk and water.
  • Answer: Sublimation

Study and Exam Preparation

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  • Practicing with real questions enhances understanding and retention.
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