MCQ on Thermodynamics: Previous trends reveal that NEET/JEE aspirants find Physics as the most challenging section amongst the other sections. But most of them fail to decipher the reason behind this. This particularly can be as the candidates taking up this examination are predominantly medical aspirants with their subject of interest being Biology. Also, sections like Physics are more on theories, laws, numerical as opposed to Biology which is more of fact-based, life sciences and comprising of substantial explanations.

In this post we are providing you MCQ on Thermodynamics, which will be beneficial for you in upcoming NEET, AIIMS, JEE, WBJEE, Medical and Engineering Exams.

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MCQ on Thermodynamics

Q1. A gas is compressed to half of its initial volume isothermally. The same gas is compressed again until the volume reduces to half through an adiabatic process. Then work done _______.
a) during isothermal compression is more
b) is independent of the processes used for compression
c) is more during the adiabatic process
d) is dependent on the atomicity of the gas

Q2. What is the ratio of Cp/Cv for gas if the pressure of the gas is proportional to the cube of its temperature and the process is an adiabatic process ?
a) 2
b) 3/2
c) 4/3
d) 5/3

Q3. A thermodynamic system is explained with the help of the graph ABCD. What is the heat rejected by the

a)  pV
b) 2pV
c) 4pV
d)1/2 pV

Q4. Select the factor that affects the heat of reaction which is based on Kirchoff’s equation.
a) Molecularity
b) Temperature
c) Pressure
d) Volume

Q5. Which of the following process is used to do maximum work done on the ideal gas if the gas is compressed to half of its initial volume?
a) Isothermal
b) Isochoric
c) Isobaric
d) Adiabatic

Q6. What is a necessary condition for a reaction to be spontaneous at all temperatures?
a) ΔH < ΔG
b) ΔG and ΔH should be positive
c) ΔG and ΔH should be negative
d) ΔH = ΔG = 0

Q7. The coefficient performance of a refrigerator is 5. If the temperature inside the freezer is -20℃, calculate the heat rejected to the surrounding.
a) 11℃
b) 41℃
c) 21℃
d) 31℃

Q8. Following is the diagram of the thermodynamic process. Refer the diagram and match the following.

P Process – I (a) Adiabatic

Q Process – II (b) Isobaric

R Process – III (c) Isochoric

S Process – IV (d) Isothermal

a) (P,c), (Q,d), (R,b), (S,a)
b) (P,c), (Q,d), (R,b), (S,a)
c) (P,a), (Q,c), (R,d), (S,b)
d) (P,c), (Q,a), (R,d), (S,b)

Q9. Select the incorrect statement.
a) For the triple point of water, 1°K is equal to 1/273.16.
b) The first law of thermodynamics is also known as the law of thermal equilibrium
c) The triple point of water is one of the reference points on the thermodynamic scale of temperature
d) At room temperature, the heat of combustion is not found

Q10. ABCDA is a cyclic process explaining the thermodynamic process. What is the work done by the system in the

a)  Zero
b) ρ0V0/2
c) ρ0V0
d) 2ρ0V0

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By Team Learning Mantras