NEET 2016 Phase 2 | Heat and Thermodynamics Question 27 | Physics

NEET 2016 Phase 2

MCQ (Single Correct Answer)

-1

The temperature inside a refrigerator is t₂ ^oC. The amount of heat delivered to the room for each joule of electrical energy consumed ideally will be

$${{{t_1}} \over {{t_1} - {t_2}}}$$

$${{{t_1} + 273} \over {{t_1} - {t_2}}}$$

$${{{t_2} + 273} \over {{t_1} - {t_2}}}$$

$${{{t_1} + {t_2}} \over {{t_1} + 273}}$$

NEET 2016 Phase 2

MCQ (Single Correct Answer)

-1

A given sample of an ideal gas occupies a volume V at a pressure P and absolute temperature T. The mass of each molecule of the gas is m. Which of the following gives the density of the gas ?

P/(kT)

Pm/(kT)

P/(KTV)

mkT

NEET 2016 Phase 1

MCQ (Single Correct Answer)

-1

A gas is compressed isothermally to half its initial volume. The same gas is compressed separately through an adiabatic process until its volume is again reduced to half. Then

Compressing the gas isothermally or adiabatically will require the same amount of work.

Which of the case (whether compression through isothermal or through adiabatic process) requires more work will depend upon the atomicity of the gas.

Compressing the gas isothermally will require more work to be done.

Compressing the gas through adiabatic process will require more work to be done.

NEET 2016 Phase 1

MCQ (Single Correct Answer)

-1

The molecules of a given mass of a gas have r.m.s. velocity of 2000 m s^$$-$$1 at 27^oC and 1.0 $$ \times $$ 10⁵ N m^$$-$$2 pressure. When the temperature and pressure of the gas are respectively, 127^oC and 0.05 $$ \times $$ 10⁵ N m^$$-$$2, the r.m.s. velocity of its molecules in m s^$$-$$1 is

$${{100\sqrt 2 } \over 3}$$

$${{100} \over 3}$$

$$100\sqrt 2 $$

$${{400} \over {\sqrt 3 }}$$

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