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Evaporation and condensation continue simultaneously but the rate of evaporation is ____ the rate of condensation.

Lower than

Higher than

Same as

None of the above

A candy bar has a marked nutritional value of 350 cal. How many kilowatt-hours of energy will it deliver to the body as it is digested?

0.407 kW.h

0.426 kW.h

2.328 kW.h

5.538 kW.h

If 300 kJ of heat is needed to take ice of mass, m=720 g at –10oC to a liquid state at xoC, then xoC is equal to

5oC

10oC

10oC

20oC

If 210 kJ heat is supplied to ice of mass m=720 g at –10oC, then what are the final state at 0oC temperature of the water?

580 g water, 140 g ice

500 g water, 220 g ice

475 g water, 245 g ice

450 g water, 270 g ice

Critical temperature of a gas is the temperature below which a gas can be liquefied by

The application of temperature alone

The application of pressure alone

Decreasing the mass of gas

Both (a) and (b)

At the temperatures below the critical temperature there is _______ in the value of PV. With increase in pressure.

Sudden increase

Sudden decrease

No change

None of the above

At the critical point, the rate of change of pressure with volume is zero. This point is called

The point of inflexion

The point of conduction

The point of refrigeration

The point of heat-path function.

The densities of the vapour and the liquid gradually approach each other and their densities are equal at

The boiling point

The melting point

The freezing point

The critical point

The compressibility of the vapour becomes______ at the critical temperature.

Zero

One

Infinite

Ten times more

According to density-temperature graph,

The density of saturated vapour increases with rise in temperature

The density of liquid increases with rise in temperature

The density of liquid increases with rise in temperature

The density of liquid has no effect with decrease in temperature

Lower than

Higher than

Same as

None of the above

A candy bar has a marked nutritional value of 350 cal. How many kilowatt-hours of energy will it deliver to the body as it is digested?

0.407 kW.h

0.426 kW.h

2.328 kW.h

5.538 kW.h

If 300 kJ of heat is needed to take ice of mass, m=720 g at –10oC to a liquid state at xoC, then xoC is equal to

5oC

10oC

10oC

20oC

If 210 kJ heat is supplied to ice of mass m=720 g at –10oC, then what are the final state at 0oC temperature of the water?

580 g water, 140 g ice

500 g water, 220 g ice

475 g water, 245 g ice

450 g water, 270 g ice

Critical temperature of a gas is the temperature below which a gas can be liquefied by

The application of temperature alone

The application of pressure alone

Decreasing the mass of gas

Both (a) and (b)

At the temperatures below the critical temperature there is _______ in the value of PV. With increase in pressure.

Sudden increase

Sudden decrease

No change

None of the above

At the critical point, the rate of change of pressure with volume is zero. This point is called

The point of inflexion

The point of conduction

The point of refrigeration

The point of heat-path function.

The densities of the vapour and the liquid gradually approach each other and their densities are equal at

The boiling point

The melting point

The freezing point

The critical point

The compressibility of the vapour becomes______ at the critical temperature.

Zero

One

Infinite

Ten times more

According to density-temperature graph,

The density of saturated vapour increases with rise in temperature

The density of liquid increases with rise in temperature

The density of liquid increases with rise in temperature

The density of liquid has no effect with decrease in temperature

This test is very helpful for AIEEE and IIT JEE exam preparation.

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