A. Extensive property
B. Intensive property
C. Force which drives the chemical system to equilibrium
D. Both B and C
✅ The correct answer is option D.
Thermodynamics MCQs
Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg . K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is
A. Superheated vapour
B. Partially condensed vapour with quality of 0.9
C. Saturated vapour
D. Partially condensed vapour with quality of 0.1
✅ The correct answer is option A.
Specific heat of a gas for a reversible adiabatic process is
A. Negative
B. Zero
C. Infinity
D. None of these
✅ The correct answer is option B.
Heat pump
A. Accomplishes only space heating in winter
B. Accomplishes only space cooling in summer
C. Accomplishes both A and B
D. Works on Carnot cycle
✅ The correct answer is option C.
A domestic refrigerator has a/an __________ cooled condenser.
A. Water
B. Air
C. Evaporative
D. Gas
✅ The correct answer is option B.
In an ideal refrigeration cycle, the change in internal energy of the fluid is
A. +ve
B. -ve
C. 0
D. Either of the above three ; depends on the nature of refrigerant
✅ The correct answer is option C.
Thermal efficiency of a Carnot engine can approach 100%, only when the temperature of the
A. Cold reservoir approaches zero
B. Hot reservoir approaches infinity
C. Either A or B
D. Neither A nor B
✅ The correct answer is option C.
__________ explains the equilibrium constant for any chemical reaction.
A. Henry’s law
B. Law of mass action
C. Hess’s law
D. None of these
✅ The correct answer is option B.
The unity of Planck’s constant ‘h’ in the equation, E = hv is
A. J/s
B. J.S
C. J/kmol
D. Kmol/J
✅ The correct answer is option B.
In a turbine, the fluid expands almost
A. Isothermally
B. Isobarically
C. Adiabatically
D. None of these
✅ The correct answer is option C.