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CSEE (Form 4) States of Matter and the Kinetic Molecular Theory — practice questions

Explore 2 free States of Matter and the Kinetic Molecular Theory questions in CSEE (Form 4) Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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States of Matter and the Kinetic Molecular Theory questions and exercises with answers

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What is the movement of particles from a high concentration to a low concentration called?Read the answer and worked solution →Ice is heated steadily and starts to melt. What happens to its temperature while the melting is going on?Read the answer and worked solution →

Worked practice questions

What is the movement of particles from a high concentration to a low concentration called?

  1. Sublimation
  2. Diffusion
  3. Condensation
  4. Evaporation
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Correct answer: B. Diffusion

1. A drop of food colouring slowly spreads out through a glass of water. 2. Diffusion is the movement of particles from a high concentration to a low concentration. 3. This spreading only happens because matter is made of particles that keep moving. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 3: States of matter and the kinetic molecular theory_

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Ice is heated steadily and starts to melt. What happens to its temperature while the melting is going on?

  1. It rises steadily
  2. It falls steadily
  3. It rises then falls
  4. It stays constant
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Correct answer: D. It stays constant

1. Heating usually raises the temperature of a substance. 2. While a substance melts or boils the temperature remains constant until the change of state is finished. 3. The energy going in is used to break the forces holding the particles in place. 4. Once every particle has changed state, the temperature starts to rise again. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 3: States of matter and the kinetic molecular theory_

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