Number of components (C), phase (P) and degrees of freedom (F) are related by Gibbs phase rule as:
A. P + F – C = 2
B. C = P – F + 2
C. F = C – P – 2
D. P = F – C – 2
Entropy change in case of reversible adiabatic process is:
A. Minimum
B. Zero
C. Maximum
D. Indeterminate
Fundamental principle of refrigeration is based on the _____ law of thermodynamics:
A. Zeroth
B. First
C. Second
D. Third
For a constant volume process:
A. dE = CpdT
B. dE = CvdT
C. dQ = dE + pdV
D. dW = pdV
At absolute zero temperature, the _____ of the gas is zero:
A. Pressure
B. Volume
C. Mass
D. None of these
Joule-Thomson Co-efficient at any point on the inversion curve is:
A. ∞
B. +ve
C. 0
D. -ve
No work is done by the system, when a reaction occurs at constant:
A. Volume
B. Temperature
C. Pressure
D. None of these
If atmospheric temperature and dew point are nearly equal, then the relative humidity is:
A. Zero
B. 50%
C. Almost 100%
D. unpredictable
What is the value of Joule-Thomson co-efficient for an ideal gas:
A. +ve
B. -ve
C. 0
D. ∞
In any spontaneous process, the ______ free energy decreases:
A. Helmholtz
B. Gibbs
C. Both A. & B.
D. Neither A. nor B.
