A. Rate of change of vapour pressure with temperature
B. Effect of an inert gas on vapour pressure
C. Calculation of ΔF for spontaneous phase change
D. Temperature dependence of heat of phase transition
Thermodynamics for Chemical
For an ideal solution, the value of activity co-efficient is______________________?
A. 0
B. 1
C. 1
As the temperature is lowered towards the absolute zero, the value of the quantity (∂ΔF/∂T) approaches________________?
A. Zero
B. Unity
C. Infinity
D. None of these
Reduced pressure of a gas is the ratio of its__________________?
A. Pressure to critical pressure
B. Critical pressure to pressure
C. Pressure to pseudocritical pressure
D. Pseudocritical pressure to pressure
Specific heat of a gas for a reversible adiabatic process is________________?
A. Negative
B. Zero
C. Infinity
D. None of these
The second law of thermodynamics states that___________________?
A. The energy change of a system undergoing any reversible process is zero
B. It is not possible to transfer heat from a lower temperature to a higher temperature
C. The total energy of system and surrounding remains the same
D. None of the above
Joule-Thomson experiment is__________________?
A. Isobaric
B. Adiabatic
C. Isenthalpic
D. Both B. & C.
“At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero”. This follows from the __________________?
A. Third law of thermodynamics
B. Second law of thermodynamics
C. Nernst heat theorem
D. Maxwell’s relations
Which of the following decreases with increase in pressure ?
A. Melting point of ice
B. Melting point of wax
C. Boiling point of liquids
D. None of these
At the critical point of a substance____________?
A. The surface tension vanishes
B. Liquid and vapour have the same density
C. There is no distinction between liquid and vapour phases
D. All A, B. and C
