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Chemistry · PYQ NEET UG 2019(1)

हिन्दी

A gas at \( 350\text{ K} \) and \( 15\text{ bar} \) has molar volume \( 20 \) percent smaller than that for an ideal gas under the same conditions. The CORRECT option about the gas and its compressibility factor (\( \text{Z} \)) is _________

  1. \( \text{Z} > 1 \) and repulsive forces are dominant
  2. \( \text{Z} < 1 \) and attractive forces are dominant
  3. \( \text{Z} < 1 \) and repulsive forces are dominant
  4. \( \text{Z} > 1 \) and attractive forces are dominant

Correct answer · Option 2

\( \text{Z} < 1 \) and attractive forces are dominant

Explanation

Since molar volume is smaller than ideal, \( \text{Z} = \frac{V_{\text{real}}}{V_{\text{ideal}}} < 1 \), which implies attractive forces are dominant.
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