Melting and Solidification Quiz Questions and Answers PDF Download - 25

Melting occurs at a constant temperature for

1. impure substances only
2. pure substances only
3. impure and pure substances both
4. none

Among the four, the highest wavelength is of

1. radio waves
2. infrared
3. ultraviolet
4. gamma rays

Air is result of

1. Magnetic force
2. electric force
3. contact force
4. gravitational force

Latent heat of vaporization is

1. the amount of heat required to raise the temperature of a 1 kg of a substance by 1 K
2. the amount of heat required to raise the temperature of a substance by 1 K
3. the amount of heat required to change the phase of a substance from solid to liquid without any change in temperature
4. the amount of heat required to change the phase of a substance from liquid to gas without any change in temperature

Electromagnetic waves carry

1. positive charge
2. negative charge
3. no charge
4. both positive and negative charge