NEET Chemistry First Law Assertion Reason Question
Assertion (A): In an isolated system, the change in internal energy is zero. | Reason (R): In an isolated system, no energy is transferred as heat or work.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false.
Correct Answer
Detailed Explanation
The NCERT context states that in an isolated system, there is no transfer of energy as heat or work, leading to zero change in internal energy (∆U = 0). Hence, both the assertion and reason are true, and R correctly explains A.
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