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Chemistry · PYQ NEET UG 2020

हिन्दी

The CORRECT option for free expansion of an ideal gas under adiabatic condition is _______.

  1. A
    \( q = 0, \Delta T < 0\text{ and }w > 0 \)
  2. B
    \( q < 0, \Delta T = 0\text{ and }w = 0 \)
  3. C
    \( q > 0, \Delta T > 0\text{ and }w > 0 \)
  4. D
    \( q = 0, \Delta T = 0\text{ and }w = 0 \)
View Answer & Solution

Correct answer · Option D

\( q = 0, \Delta T = 0\text{ and }w = 0 \)

Explanation

For free expansion of an ideal gas, \( w = 0 \). Since it is adiabatic, \( q = 0 \). By First Law of Thermodynamics, \( \Delta U = q + w = 0 \), hence \( \Delta T = 0 \).
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