Question:

The critical temperature of A, B, C, D gases are 190 K, 630 K, 261 K, 400 K respectively. The quantity of gas adsorbed per gram of charcoal at same pressure is least for the gas

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Remember that higher critical temperature means easier liquefaction and greater adsorption.
Updated On: Mar 13, 2025
  • D
  • C
  • B
  • A
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The Correct Option is D

Solution and Explanation

The critical temperature of a gas is directly proportional to its ease of liquefaction. Gases with higher critical temperatures are easier to liquefy. The extent of adsorption of a gas on a solid surface is related to its ease of liquefaction. Gases that are easier to liquefy are adsorbed to a greater extent. Given the critical temperatures of the gases:
A: 190 K
B: 630 K
C: 261 K
D: 400 K
The gas with the lowest critical temperature will be the least easily liquefied and hence will be adsorbed the least.
Therefore, gas A with a critical temperature of 190 K will be adsorbed the least.
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