10th Class Chemistry Chapter 1 TestSTATES OF MATTER AND PHASE CHANGES

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. What happens to the movement of particles when a gas is cooled?

   1. They repel each other more

   2. They disappear

   3. They move faster

   4. Their kinetic energy decreases

2. At a given temperature, lighter gases diffuse:

   1. Slower

   2. Slower

   3. At same rate

   4. Not at all

3. A student noticed frost falling on the ground at 6.30 am and disappearing by 8.30 am. Which phase change was responsible for changing the frost into water vapours?

   1. Melting

   2. Evaporation

   3. Sublimation

   4. Deposition

4. Sublimation printing is highly popular and commercially ideal for:

   1. Bulk paper textbook printing

   2. Print-on-demand t-shirts

   3. Temporary body tattoos

   4. Painting outdoor walls

5. The formation of frost in winter is an example of which process?

   1. Sublimation

   2. Evaporation

   3. Deposition

   4. Condensation

6. Lipid soluble drugs are often more effective because they cross membrane they:

   1. Diffuse more easily

   2. Diffuse slowly

   3. Evaporate quickly

   4. Do not diffuse

7. Which state of the matter keeps its level and have a fixed volume?

   1. Solid

   2. Liquid

   3. Gas

   4. Plasma

8. In Boyle's experiment what was used to trap the air and apply pressure?

   1. A piston

   2. Mercury

   3. Oil

   4. Water

9. During the process of condensation, the temperature:

   1. Will increase

   2. Will decrease

   3. Remains constant

   4. Becomes zero

10. If you double the number of gas particles in a container while keeping T and P constant, what happens to the volume?

    1. The volume is halved

    2. The volume doubles

    3. The volume triples

    4. The volume stays the same