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Question

Assertion :In a gas any rapid change must be adiabatic whereas a slow change may be adiabatic. Reason: In a P-V diagram, the magnitude of the slope is greater for an adiabatic process than for an isothermal process.

A
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
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B
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
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C
Statement 1 is true but statement 2 is false.
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D
Statement 1 is false but statement 2 is true.
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Solution

The correct option is D Statement 1 is false but statement 2 is true.
For adiabatic process, change in heat energy is zero so, process occurs rapidly or suddenly like burst of a tyre etc. but when process occurs slowly there is heat exchange and process become isothermal not adiabatic and

SlopeofadiabaticSlopeofisothermal=γ.
Hence, the answer is statement 1 is false and statement 2 is true.

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