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Question

The critical temperatures of CO, CH4, HCl and SO2 are 134K, 190K, 324K and 430K respectively. The order of extension of adsorption of these gases on charcoal is
  1. SO2>HCl>CH4>CO
  2. HCl>SO2>CO>CH4
  3. CO>CH4>HCl>SO2
  4. CH4>CO>SO2>HCl


Solution

The correct option is A SO2>HCl>CH4>CO
The gas with a higher value of critical temperature will have stronger vander waal’s forces and hence easily adsorbed on charcoal.

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