August 2022

Question: A refrigerator may be termed as a
[A].

heat pump

[B].

heat engine

[C].

Carnot engine

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Generation of heat by friction is an example of a/an __________ change.
[A].

isothermal

[B].

irreversible

[C].

adiabatic

[D].

reversible

Answer: Option B

Explanation:

No answer description available for this question.

Question: A gas performs the maximum work, when it expands
[A].

non-uniformly

[B].

adiabatically

[C].

isobarically

[D].

isothermally

Answer: Option C

Explanation:

No answer description available for this question.

Question: Heating of water under atmospheric pressure is an __________ process.
[A].

isochoric

[B].

isobaric

[C].

adiabatic

[D].

isothermal

Answer: Option B

Explanation:

No answer description available for this question.

Question: Internal energy change of a system over one complete cycle in a cyclic process is
[A].

zero

[B].

+ve

[C].

-ve

[D].

dependent on the path

Answer: Option A

Explanation:

No answer description available for this question.

Question: An ideal monoatomic gas is taken round the cycle ABCDA as shown below in the P-V diagram The work done during the cycle is
[A].

PV

[B].

2PV

[C].

PV/2

[D].

0

Answer: Option A

Explanation:

No answer description available for this question.

Question: A thermodynamic system is taken from state A to B along ACB and is brought back to A along BDA as shown below in the P-V diagram.The net work done during the complete cycle is given by the area covered by
[A].

P1ACBP2P1

[B].

ACBB1A1A

[C].

ACBDA

[D].

ADBB1A1A

Answer: Option C

Explanation:

No answer description available for this question.

Question: An ideal gas is taken around the cycle ABCA as shown in P-V diagram below :The work done by the gas during the cycle is equal to
[A].

12 P1V1

[B].

6 P1V1

[C].

3 P1V1

[D].

P1V1

Answer: Option C

Explanation:

No answer description available for this question.

Question: A large iceberg melts at the base, but not at the top, because of the reason that
[A].

ice at the base contains impurities which lowers its melting point.

[B].

due to the high pressure at the base, its melting point reduces.

[C].

the iceberg remains in a warmer condition at the base.

[D].

all (a), (b) and (c).

Answer: Option B

Explanation:

No answer description available for this question.

Question: If atmospheric temperature and dew point are nearly equal, then the relative humidity is
[A].

zero

[B].

50%

[C].

almost 100%

[D].

unpredictable

Answer: Option C

Explanation:

No answer description available for this question.