Expansion of Air Due to Heating

Q. Air pressure ______ with increase in temperature.

1. remains the same
2. variation cannot be predicted
3. decreases
4. increases

Q.

The center of a cyclone is a calm area and is called the _________of the storm.

1. eye

2. focus

3. arm

4. radius

Q.

What are the disadvantages of cyclones?

Q. Why are people advised not to stand near fast moving trains?

Q.

High speed wind can cause cyclone in regions of ___________ pressure.

Q. Air around us exerts on us.

1. volume
2. pressure
3. temperature

Q.

1. Decreases

2. Remains same

3. Increases

4. None of these

Q. A bird flying in the air experiences pressure.

1. no
2. hydrostatic
3. atmospheric
4. liquid

Q.

Warm air is less denser than cold air.

1. False

2. True

Q.

If we take same amount of hot and cold air, in a given fixed volume of a container, then which of the following statements is correct?

1. Hot air exerts more pressure on the walls of the container.

2. Cold air exerts more pressure on the walls of the container.

3. Both hot and cold air exert same pressure on the walls of the container.

4. Pressure of hot and cold air cannot be compared.

Q. The volume of the air _______ when we heat the air.

1. increases
2. decreases
3. remains same
4. cannot be predicted

Q. The volume occupied by a gas increases with decrease in temperature.

1. True
2. False

Q. Volume occupied by the gas decreases with the increase in temperature.

1. True
2. False

Q. Air pressure does not vary with temperature.

1. False
2. True

Q. Air pressure ______ with increase in temperature.

1. increases
2. remains the same
3. variation cannot be predicted
4. decreases

Q. The particles of gas become less energetic with the increase in temperature.

1. False
2. True

Q.

Beakers A and B have the same amount of air initially. The beakers are dipped in water at different temperatures. Which of the following statements is correct with respect to the given figure?

1. Water in both the beakers is at the same temperature.
2. Water in beaker A is hotter than that in B.
3. Water in beaker B is hotter than that in A.
4. Temperature of water in beaker A and B cannot be predicted.