NEET Chemistry First Law Assertion Reason Question
Assertion (A): The internal energy change (ΔU) of a system is independent of the path taken.
Reason (R): In an isolated system where no heat or work is transferred, ΔU remains constant.
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 but R is true.
Correct Answer
Detailed Explanation
According to the first law of thermodynamics, ΔU depends only on the initial and final states and is independent of the path; for an isolated system, ΔU is constant as no heat or work is transferred.
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