Checkpoint Challenges: Level 2 - Solids, Liquids, and Gases

Instructions

This set of questions is designed for students who have some familiarity with the topic of Solids, Liquids, and Gases. These questions focus on key syllabus points and are sourced from past IGCSE Chemistry (0620) papers to ensure relevance and exam readiness.

Question 1

Which statement correctly describes the particles in a liquid compared to a solid?

• A) More tightly packed

• B) Stronger intermolecular forces

• C) Move past each other

• D) Fixed, regular pattern
  Source: IGCSE 0620/32, May/June 2019, Q4

Question 2

What occurs during the boiling of a liquid?

• A) Only surface particles become gas

• B) Bubbles form throughout the liquid

• C) Temperature decreases

• D) Particles move closer together
  Source: IGCSE 0620/22, Oct/Nov 2018, Q7

Question 3

Which process involves a gas changing directly into a solid?

• A) Melting

• B) Deposition

• C) Sublimation

• D) Condensation
  Source: IGCSE 0620/41, May/June 2020, Q5

Question 4

How does increasing the temperature affect the particles in a gas?

• A) Decreases kinetic energy

• B) Increases speed

• C) Causes fixed movement

• D) Reduces distance between particles
  Source: IGCSE 0620/12, May/June 2021, Q3

Question 5

Which of the following is true about the melting point of a substance?

• A) Same as boiling point

• B) Temperature for solid to liquid

• C) Temperature for liquid to gas

• D) Varies with pressure
  Source: IGCSE 0620/23, Oct/Nov 2017, Q2

Question 6

What happens to the particles in a solid as it melts?

• A) Move slower

• B) Become fixed

• C) Gain energy and move freely

• D) Lose energy
  Source: IGCSE 0620/31, May/June 2019, Q6

Question 7

Which state of matter has a definite volume but no definite shape?

• A) Solid

• B) Liquid

• C) Gas

• D) Plasma
  Source: IGCSE 0620/13, Oct/Nov 2020, Q8

Question 8

During evaporation, which particles escape from the liquid?

• A) Those at boiling point

• B) Below the surface

• C) Highest energy particles

• D) Lowest energy particles
  Source: IGCSE 0620/21, May/June 2020, Q9

Question 9

Which factor does NOT affect the rate of evaporation?

• A) Surface area

• B) Temperature

• C) Humidity

• D) Color of liquid
  Source: IGCSE 0620/32, Oct/Nov 2019, Q10

Question 10

What is the main difference between boiling and evaporation?

• A) Boiling occurs only at the surface; evaporation occurs throughout the liquid

• B) Boiling requires specific temperature; evaporation can occur at any temperature

• C) Boiling needs heat; evaporation does not

• D) Boiling turns liquid to solid
  Source: IGCSE 0620/22, May/June 2018, Q4

Here are the answers for the Checkpoint Challenges (Level 2) questions:

1. C) Move past each other
   Source: IGCSE 0620/32, May/June 2019, Q4

2. B) Bubbles form throughout the liquid
   Source: IGCSE 0620/22, Oct/Nov 2018, Q7

3. B) Deposition
   Source: IGCSE 0620/41, May/June 2020, Q5

4. B) Increases speed
   Source: IGCSE 0620/12, May/June 2021, Q3

5. B) Temperature for solid to liquid
   Source: IGCSE 0620/23, Oct/Nov 2017, Q2

6. C) Gain energy and move freely
   Source: IGCSE 0620/31, May/June 2019, Q6

7. B) Liquid
   Source: IGCSE 0620/13, Oct/Nov 2020, Q8

8. C) Highest energy particles
   Source: IGCSE 0620/21, May/June 2020, Q9

9. D) Color of liquid
   Source: IGCSE 0620/32, Oct/Nov 2019, Q10

10. B) Boiling requires specific temperature; evaporation can occur at any temperature
    Source: IGCSE 0620/22, May/June 2018, Q4

Scoring Guide:

• 8-10 Correct: Excellent! Move on to Mastery Missions (Level 3).

• 6-7 Correct: Good job, but consider reviewing the topic for missed details.

• Below 6: Review the syllabus and retry the questions.

Great work on progressing through this level! 🎉