Reversible and Irreversible Processes NEET Questions

Physics - Thermodynamics

Reversible and Irreversible Processes MCQ Questions


7.
Which of the following is true for a reversible adiabatic process?
A.
Entropy remains constant
B.
Pressure remains constant
C.
Temperature remains constant
D.
Heat remains constant
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ANSWER :
A. Entropy remains constant
8.
The efficiency of a reversible engine is always:
A.
Equal to 1
B.
Equal to zero
C.
Less than 1
D.
Greater than 1
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ANSWER :
A. Equal to 1
9.
A process is said to be reversible if:
A.
The process is very fast
B.
The system is isolated
C.
The process is quasi-static
D.
There is a finite gradient
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ANSWER :
C. The process is quasi-static
10.
In an irreversible process, the change in entropy of the universe is:
A.
Always zero
B.
Always positive
C.
Always negative
D.
Can be positive or negative
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ANSWER :
B. Always positive
11.
Which of the following is not a reversible process?
A.
Isothermal expansion of an ideal gas
B.
Slow compression of a gas
C.
Melting of ice at 0°C
D.
Free expansion of a gas
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ANSWER :
D. Free expansion of a gas
12.
The work done in a reversible process is:
A.
Minimum
B.
Maximum
C.
Independent of path
D.
Zero
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ANSWER :
B. Maximum