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Physics · UNITS AND MEASUREMENT

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Why is the ratio of molar volume to atomic volume of a gas at STP extremely large (of the order of \( 10^4 \) to \( 10^5 \))?

  1. Because molecules of a gas are very heavy
  2. Because the average separation between gas molecules is much larger than the size of the molecules
  3. Because intermolecular forces are attractive
  4. Because temperature at STP is high

Correct answer · Option 2

Because the average separation between gas molecules is much larger than the size of the molecules

Explanation

In a gas, molecules are widely separated and the average inter-molecular distance is much larger than the physical size of individual molecules.

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