Heat

Resultant temperature of a mixture of of 20 g ice at 0°c and 20 g water at 50 °c

Specific heat of water in cal/g°c

_____behaves like heat stores house for the earth

• Oceans

• Hills

• Plateaus

• All the above

The presence of water vapour molecules in air is

• Dew

• Humidity

• Fog

• Condensation

The principle of method of mixtures

• Heat gain by hot body is equal to heat lost by cold

• Heat gain by heavier body is equal to heat lost by lighter body

• Heat gained by cold body is equal to heat lost by hot body

• All the above

Si units of specific heat

• J.kg.K

• J/kg.K

• Kg/J.K

• K/J.kg

Which of the following is a cooling process

• Condensation

• Boiling

• Evaporation

• All the above

The process of escaping of molecules from the surface of a liquid at any temperature is called

• Melting

• Condensation

• Freezing

• Evaporation

Temperature of an iron rod is 330 K. Its temperature in centigrade

• 55

• 59

• 53

• 57

Rate of evaporation depends on

• Surface area

• Temperature

• Vapour already present

• All the above