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Q.

Assertion (A): The internal energy of an ideal gas does not change during an isothermal process.
Reason (R): In isothermal process product of pressure and volume is constant.

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a

Both A and R are true and R is the correct explanation of A

b

Both A and R are true and R is not the  correct explanation of A

c

A is true but R is false

d

Both A and R are false

answer is B.

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Detailed Solution

In isothermal process, temperature remains constant. Therefore, internal energy of an ideal gas does not change-as it is dependent only of temperature- neither on pressure nor on volume. So the assertion is true, but the reason is not a correct explanation of the assertion.

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Assertion (A): The internal energy of an ideal gas does not change during an isothermal process.Reason (R): In isothermal process product of pressure and volume is constant.