Effect of Temperature on Matter

Q.

For any substance, why does the temperature remain constant during the change of state?

Q.

Why does our palm feel cold when acetone or petrol is put?

Q.

The process through which a solid directly changes to a gaseous state without passing through a liquid state is called _________.

Q.

When water is cooled, it gets converted into ice by a process called P. When ice is warmed, it gets reconverted into the water in a process called Q. Identify P and Q.

1. P:- Melting

   Q:- Solidification

2. P:- Solidification

   Q:- Melting

3. P:- Vapourisation

   Q:- Solidification

4. P:- Condensation

   Q:- Melting

Q.

Which of the following statement(s) is/are wrong?

1. Evaporation leads to cooling.

2. The rate of evaporation of an aqueous solution increases with increase in humidity.

3. Evaporation is a surface phenomenon.

4. Evaporation is a bulk phenomenon.

Q.

What happens to the speed of water molcules when it is heated?

1. Increases

2. Decreases

3. Remains same

4. Depends on the heating temperature

Q.

What happens to the heat energy when a substance changes from solid to liquid?

1. emitted

2. absorbed

3. emitted and then absorbed

4. No change in heat energy

Q. Dissolution of gases in liquids is

1. Exo-thermic
2. Endo-thermic

Q.

When a substance is heated, the kinetic energy of particles decreases?

1. True
2. False

Q.

Change in the state of matter is mainly caused by change in

1. Temperature

2. Pressure

3. Mass

4. Volume

Q.

Which of the factors are responsible for the conversion of solid $C{O}_2$ in vapours?

1. Decrease in temperature and pressure

2. Increase in temperature and decrease in pressure

3. Increase in temperature and pressure

4. Increase in pressure and decrease in temperature

Q.

Assertion: Liquid state can be converted to the gaseous state by increasing the temperature and decreasing the pressure.
Reason: Interparticle spaces increase on increasing the temperature and decreasing the pressure.

1. Both assertion and reason are correct and reason is correct explanation for assertion.

2. Both assertion and reason are correct but reason is not correct explanation for assertion.

3. Assertion is correct but reason is incorrect.

4. Assertion is incorrect but reason is correct.

Q. Reducing temperature and applying high pressure on a gas can lead to:

1. Evaporation
2. Diffusion
3. Liquefaction
4. Sublimation

Q.

Name the following

(1). The process by which a liquid changes into a solid

Q.

During summer, Kavita carries water in a transparent plastic bottle to her school. One day, she left her bottle in the school. The bottle still had some water left in it. The following day, she observed some water droplets on the inner surface of the empty portion of the bottle. These droplets of water formed due to ____.

1. Boiling and condensation.

2. Evaporation and condensation.

3. Boiling and evaporation.

4. Evaporation and solidification.

Q.

Which one of the following phenomena would increase on raising the temperature?

1. Compression of gases

2. Expansion of gases

3. Cooling

4. Density

Q.

Why gas expands more than solids or liquids?

Q. Why do we feel a cold sensation if we put nail polish remover on our skin?

1. Acetone melts on our hand.
2. Acetone freezes on our hand surface.
3. Acetone starts boiling taking heat from the hand.
4. Acetone evaporates rapidly, leaving a cooling sensation.

Q. Which of the following can transform matter from one state to another?

1. Increasing/decreasing the temperature
2. Increasing/decreasing the concentration
3. Increasing/decreasing the pressure
4. Increasing/decreasing the mass

Q.

Which of the following sets of phenomena would increase on raising the temperature?

1. Diffusion, evaporation, compression of gases

2. Evaporation, compression of gases, solubility

3. Evaporation, diffusion, expansion of gases

4. Evaporation, solubility, diffusion, compression of gases

Q.

Choose the correct option and fill in the blanks

(6). The process of water changing into ice is called______________[melting/ freezing].

Q.

In which of the following processes do the change in the states of matter is endothermic?
A. Boiling
B. Sublimation
C. Condensation
D. Melting

1. A, B and C only

2. A, B and D

3. A only

4. A and B only

Q.

Which of the following can transform matter from one state to another?

1. Increasing/decreasing the temperature

2. Increasing/decreasing the concentration

3. Increasing/decreasing the pressure

4. Increasing/decreasing the mass

Q.

A liquid substance changes into a solid on freezing

1. True
2. False

Q.

What is meant by the anomalous expansion of water?

Q.

Explain condensation

Q.

Due to change in which of the following properties, matter can change from one state to another?

1. Mass

2. Shape

3. Container

4. Temperature

Q.

1. When water is cooled to 4°C it contracts.

2. At 0°C water freezes.

3. The volume of ice is more than that of water.

4. All the options are correct.

Q. The energy supplied to convert a liquid into a gas is called latent heat of .

1. fusion
2. vapourisation
3. condensation

Q. Which of the following can transform water from one state to another?

1. Change in temperature
2. Change in concentration
3. Change in pressure
4. None of the given options