Physical Chemistry MCQ on Thermodynamics
Physical Chemistry MCQ on Thermodynamics
1. Foe which thermodynamic process the change in enthalpy is zero?
(a) isothermal
(b) isochoric
(c) isobaric
(d) adiabatic
Answer: (d) adiabatic
2. What is the value of gamma for gas if the pressure of the gas is proportional to the T³ for adiabatic process ?
(a) 2
(b) 3/2
(c) 4/3
(d) 5/3
Answer: (b) 3/2
3. The coefficient performance of a refrigerator is 5. Calculate the heat emitted to the surrounding if the temperature inside system is -20⁰c.
(a) 11oC
(b) 41oC
(c) 21oC
(d) 31oC
Answer: (d) 31oC
4. According to Kirchhoff equation Which of the following factor affects the heat of reaction
(a) molecularity
(b) temperature
(c) pressure
(d) volume
Answer: (b) temperature
5. Chemical dissociation is
(a) exothermic
(b) reversible
(c) endothermic
(d) reversible and endothermic
Answer: (d) reversible and endothermic
6. The largest unit of energy is
(a) electron volt
(b) joule
(c) calorie
(d) erg
Answer: (c) calorie
7. Aunique characteristic feature of perfect black body is
(a) a good absorber only
(b) a good radiator
(c) a good absorber and a good radiator
(d) neither a radiator nor an absorber
Answer: (c) a good absorber and a good radiator
8. The thermodynamic process where heat cannot be exchanged within system and surrounding is
(a) isothermal
(b) adiabatic
(c) isobaric
(d) isotropic
Answer: (b) adiabatic
9. The law that was formulated by Nernst is
(a) First law of thermodynamics
(b) Second law of thermodynamics
(c) Third law of thermodynamics
(d) None of the above
Answer: (c) Third law of thermodynamics
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