NEET 2016 Phase 1 | Heat and Thermodynamics Question 40 | Physics

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

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

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

$$100\sqrt 2 $$

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

AIPMT 2015

MCQ (Single Correct Answer)

-1

Two vessels separately contain two ideal gases A and B at the same temperature, the pressure of A being twice that of B. Under such conditions, the density of A is found to be 1.5 times the density of B. The ratio of molecular weight of A and B is

$${1 \over 2}$$

$${2 \over 3}$$

$${3 \over 4}$$

AIPMT 2015

MCQ (Single Correct Answer)

-1

The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is $$-$$20^oC, the temperature of the surroundings to which it rejects heat is

11^oC

21^oC

31^oC

41^oC

AIPMT 2015

MCQ (Single Correct Answer)

-1

An ideal gas is compressed to half its initial volume by means of several processes. Which of the process results in the maximum work done on the gas ?

Isochoric

Isothermal

Adiabatic

Isobaric

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