Hotness and Coldness

Q. Which of the following doesn't change with temperature?

1. Mass
2. Volume
3. Density

Q.

The SI unit of specific latent heat is:

1. $J{g}^{-1}$

2. $cal{g}^{-1}$

3. $Jk{g}^{-1}$

4. $Jk{g}^{-1}{K}^{-1}$

Q.

A liquid of mass $100g$ loses heat at a rate of $200J{s}^{-1}$ for 1 minute. If the temperature of the liquid drops by $100°C$, calculate the specific capacity of the liquid.

Q. Which of the following doesn't change with temperature?

1. Volume
2. Density
3. Mass

Q.

______ is the energy of random motion of constituent molecules constituting the body. It flows from a hot body to a cold body.

1. Velocity

2. Heat

3. Temperature

4. Kinetic energy

Q.

How much heat energy is gained when $0.6kg$of water at ${25}^{°}C$is brought to its boiling point? [Sp. heat capacity of water$=4200Jk{g}^{-1}°C^{-1}$]

Q.

SI unit of thermal capacity is:

1. Jkg^-1

2. kJ kg^-1

3. JK^-1

4. Cal °C^-1

Q.

The hotness of an object is determined by its temperature.

1. True
2. False

Q. The two blocks shown below have the same temperature, same mass and same composition painted in different textures. Choose the correct statement(s).​​
Statement 1: Both blocks have the same amount of heat.​​
Statement 2: When connected, no heat flows between the two blocks.​

1. Both the statements are incorrect.​
2. Statement 1 is incorrect and statement 2 is correct.​
3. Statement 1 is correct and statement 2 is incorrect.​
4. Both the statements are correct.​

Q.

After holding a pack of ice in your hand for some time, you put your hand in water at room temperature. Your hand would now feel ___.

1. strikingly colder

2. mildly colder

3. same as before

4. hotter

Q.

Heat exchange takes place___.

1. for two bodies at different temperatures kept in contact

2. for two bodies at same temperature kept in contact

3. only in alloys

4. only in metals

Q. ___ is the energy of random motion of constituent molecules constituting the body. It flows from a hot body to a cold body.

1. Velocity

2. Heat

3. Temperature

4. Kinetic energy

Q.

What happens when the temperature of a substance is increased?

1. It does not cause any change

2. Kinetic energy of the molecules of the substance decreases

3. Kinetic energy of the molecules of the substance increases

4. The amplitude of vibrations of molecules of the substance about their mean position decreases

Q.

Heat is a form of ……………

Q.

___is the energy of random motion of constituent molecules constituting the body. It flows from a hot body to a cold body.

Q.

Temperature is defined as ___.

1. heat energy

2. measure of hotness only

3. measure of coldness only

4. measure of hotness or coldness

Q. Our sense of touch is unreliable to decide if an object is hot or cold.

1. False
2. True

Q. is a reliable measure of the degree of hotness or coldness of a body.

1. Heat
2. Pressure
3. Temperature

Q.

_________ is a reliable measure of the degree of hotness or coldness of a body.

1. Heat

2. Pressure

3. Temperature

4. Density

Q.

Our sense of touch is reliable to measure hotness or coldness of a body.

1. True

2. False

Q. Degree of hotness or coldness of an object is called

1. Thermometer
2. Celsius
3. Temperature
4. Heat