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Assertion: During an adiabatic process, heat energy is not exchanged between system and its surroundings. 

Reason: The temperature of a gas increases when it undergoes an adiabatic expansion.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

1 Answer

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Best answer

Correct option  (c) A is true but R is false

Explanation:

In adiabatic process, no heat enters or leaves the system. The system is completely insulated from its surroundings. From first law of themodynamics, change in internal energy,

Since the work is done at the expense of internal energy, therefore :internal energy of the system decreases and hence temperature of the gas falls.

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