TEST SERIES - 60 (I)

Which of the following is the best conductor of the heat?

• Mercury

• Silver

• Leather

• Benzene

In an isothermal change an ideal gas obey’s

• Boyle’s law

• Charle’s law

• Gay-Lussac’s law

• None of the above

A refrigerator, with its powers on, is kept in closed room with its door open. The temperature of the room will

• Rise

• Fall

• Remains the same

• None of the above

The thermal conductivity of a plate depends on

• The temperature difference between the two sides

• The thickness of the plate

• The area of the plate

• None of the above

A gas behaves as an ideal gas more closely at

• Low pressure and high temperature

• High pressure and low temperature

• Low pressure and low temperature

• High pressure and high temperature

The thermal conductivity of a plate depends on

• The temperature difference between the two sides

• The thickness of the plate

• The area of the plate

• None of the above

A gas has

• One specific heat

• Two specific heat

• Three specific heat

• Iinfinite specific heat

The heat transferred by the radiator of a refrigerator is

• More than that at the freezer

• Less than that at the freezer

• The same as that at the freezer

• None of the above

Heat is transmitted from higher to lower temperature through actual mass motion of the molecules in

• Conduction

• Convection

• Radiation

• All of the above

If an ideal gas is isothermally expanded, its internal energy will

• Increase

• Decrease

• Remain the same

• None of the above