471. The internal energy of an ideal gas is a function of its __________ only.
A. Molecular size
B. Volume
C. Pressure
D. Temperature
✅ The correct answer is option D.
Thermodynamics MCQs
472. In any spontaneous process,
A. Only F decreases
B. Only A decreases
C. Both F and A decreases
D. Both F and A increase
✅ The correct answer is option C.
473. Which of the following identities can be most easily used to verify steam table data for superheated steam.
A. (∂T/∂V)S = (∂p/∂S)V
B. (∂T/∂P)S = (∂V/∂S)P
C. (∂P/∂T)V = (∂S/∂V)T
D. (∂V/∂T)P = -(∂S/∂P)T
✅ The correct answer is option D.
474. One ton of refrigeration capacity is equivalent to the heat removal rate of
A. 50 k cal/hr
B. 200 BTU/hr
C. 200 BTU/minute
D. 200 BTU/day
✅ The correct answer is option C.
475. Which of the following behaves most closely like an ideal gas?
A. He
B. N₂
C. O₂
D. H₂
✅ The correct answer is option A.
476. Forward reaction will be favoured for the exothermic reaction, represented by CO + H₂O ⇋ CO₂ + H₂, by
A. Low temperature and high pressure
B. Low temperature and low pressure
C. High temperature and high pressure
D. High temperature and low pressure
✅ The correct answer is option A.
477. At absolute zero temperature, the __________ of the gas is zero.
A. Pressure
B. Volume
C. Mass
D. None of these
✅ The correct answer is option B.
478. For a cyclic process, a fixed ratio between heat and work
A. Always exists
B. May exist
C. Never exists
D. Is difficult to predict
✅ The correct answer is option A.
479. The difference between isothermal compressibility and adiabatic compressibility for an ideal gas is
A. 0
B. +ve
C. -ve
D. ∞
✅ The correct answer is option B.
480. What is the value of Joule-Thomson co-efficient for an ideal gas?
A. +ve
B. -ve
C. 0
D. ∞
✅ The correct answer is option C.