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AIIMS 2013
Exam
AIIMS
Year
2013
Subject
Chemistry
Chapter
Thermodynamics (C)

AIIMS 2013 · Chemistry · Thermodynamics (C)

Assertion : For an isolated system, q is zero. Reason : In an...

Assertion : For an isolated system, qq is zero. Reason : In an isolated system, change in UU and VV is zero.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

B. If both assertion and reason are true but reason is not the correct explanation of assertion.

Step-by-step solution

For an isolated system, W=q=0W=q=0 ΔU=q+W\Delta U=q+W Hence, ΔU=0\Delta U=0 W=PΔVW=P \Delta V as W=0so,ΔV=0W=0 \mathrm{so}, \Delta V=0
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