AIIMS 2017 Physics Adiabatic Processes Assertion Reason Question
In the following questions, a statement of assertion is given followed by a corresponding statement of reason. Assertion: In an adiabatic process change in the internal energy of the gas is equal to work done on or by the gas in the process. Reason: Temperature of a gas remains constant in adiabatic process.
If both assertion and reason are true and reason is correct explanation of assertion.
If both assertion and reason are true and reason is not correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
Option B is correct because the assertion accurately states that in an adiabatic process, the change in internal energy (ΔU) of the gas is equal to the work done (W) on or by the gas, as there is no heat exchange (Q = 0). However, the reason is false; in an adiabatic process, the temperature of the gas does not remain constant; it changes as the gas expands or compresses. Option A is incorrect because the reason does not correctly explain the assertion. Option C is incorrect as both statements cannot be true simultaneously, and option D is incorrect because the assertion is indeed true.
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