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Question (1)

QN0038457

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?

(A)
Isobaric
(B)
Isochoric
(C)
Isothermal
(D)
Adiabatic

Correct Answer: D

Explanation:

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Question (2)

QN0038458

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 :

(A)
Compressing the gas isothermally will require more work to be done.
(B)
Compressing the gas through adiabatic process will require more work to be done.
(C)
Compressing the gas isothermally or adiabatically will require the same amount of work.
(D)
Which of the case (whether compression through isothermal or through adiabatic process)
requires more work will depend upon the atomicity of the gas.

Correct Answer: B

Explanation:

negative of area with volume-axis W(adiabatic) (isothermal)

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Question (3)

QN0038459

Thermodynamic processes are indicated in the following diagram :
Match the following

Column I

Column II
P.
Process I
A.
Adiabatic
Q.
Process II
B.
Isobaric
R.
Process III
C.
Isochoric
S.
Process IV
D.
Isothermal

(A)
(B)
(C)
(D)

Correct Answer: A

Explanation:

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Question (4)

QN0038460

A sample of of water at and normal pressure requires of heat energy to convert to steam at . If the volume of the steam produced is , the change in internal energy of the sample, is

(A)
(B)
(C)
(D)

Correct Answer: B

Explanation:

Using first law of thermodynamics equation,

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Question (5)

QN0038461

The volume (V) of a monatomic gas varies with its temperature , as shown in the graph. The ratio of work done by the gas, to the heat absorbed by it, when it undergoes a
change from state to state , is

(A)
(B)
(C)
(D)

Correct Answer: A

Explanation:

Gas is monatomic, so

Given process is isobaric

Required ratio

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Question (6)

QN0038462

In which of the following processes, heat is neither absorbed nor released by a system?

(A)
isothermal
(B)
isobaric
(C)
adiabatic
(D)
isochoric

Correct Answer: B

Explanation:

In adiabatic process, there is no exchange of heat, with the surroundings.

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Question (7)

QN0038463

Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stop cock is suddenly opened. The process is:

(A)
adiabatic
(B)
isochoric
(C)
isobaric
(D)
isothermal

Correct Answer: A

Explanation:

Entire system is thermally insulated. So, no heat exchange with surrounding will take place. Hence, process will be adiabatic.

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Question (8)

QN0038464

An ideal gas undergoes four different processes from the same initial state as shown in the figure below. Those processes are adiabatic, isothermal, isobaric and isochoric. The curve which represents the adiabatic process among and 4 is:

(A)
2
(B)
3
(C)
4
(D)
1

Correct Answer: A

Explanation:

Curve 1 and curve 4 are isochoric and isobaric, whereas, slope of curve 3 is less than slope of curve 2 . So curve 2 should be adiabatic and curve 3 should be isothermal because (slope) isothermal < (slope) adiabatic.

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Question (9)

QN0038465

A Carnot engine has an efficiency of when its source is at a temperature . The temperature of the sink is

(A)
(B)
(C)
(D)

Correct Answer: A

Explanation:

Given, efficiency

Source temperature,

Efficiency of Carnot engine

Sink temperature,

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	Column I		Column II
P.	Process I	A.	Adiabatic
Q.	Process II	B.	Isobaric
R.	Process III	C.	Isochoric
S.	Process IV	D.	Isothermal

Question (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?

Explanation:

Link:

Question (2)

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 :

Explanation:

Link:

Question (3)

Thermodynamic processes are indicated in the following diagram : Match the following Column I Column IIP.Process IA.AdiabaticQ.Process IIB.IsobaricR.Process IIIC.IsochoricS.Process IVD.Isothermal

Explanation:

Link:

Question (4)

A sample of of water at and normal pressure requires of heat energy to convert to steam at . If the volume of the steam produced is , the change in internal energy of the sample, is

Explanation:

Link:

Question (5)

The volume (V) of a monatomic gas varies with its temperature , as shown in the graph. The ratio of work done by the gas, to the heat absorbed by it, when it undergoes a change from state to state , is

Explanation:

Link:

Question (6)

In which of the following processes, heat is neither absorbed nor released by a system?

Explanation:

Link:

Question (7)

Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stop cock is suddenly opened. The process is:

Explanation:

Link:

Question (8)

An ideal gas undergoes four different processes from the same initial state as shown in the figure below. Those processes are adiabatic, isothermal, isobaric and isochoric. The curve which represents the adiabatic process among and 4 is:

Explanation:

Link:

Question (9)

A Carnot engine has an efficiency of when its source is at a temperature . The temperature of the sink is

Explanation:

Link:

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Thermodynamic processes are indicated in the following diagram :
Match the following

Column I

Column II
P.
Process I
A.
Adiabatic
Q.
Process II
B.
Isobaric
R.
Process III
C.
Isochoric
S.
Process IV
D.
Isothermal

The volume (V) of a monatomic gas varies with its temperature , as shown in the graph. The ratio of work done by the gas, to the heat absorbed by it, when it undergoes a
change from state to state , is