# Given that Gas ${{H}_{2}},C{{H}_{4}},C{{O}_{2}},S{{O}_{2}}$Critical temperature (K) 33, 190, 304, 630On the basis of data given above, predict which of the following gases shows least adsorption on a definite amount of charcoal.A. ${{H}_{2}}$ B. $C{{H}_{4}}$ C. $S{{O}_{2}}$ D. $C{{O}_{2}}$

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Hint: In solid the amount of gas that is adsorbed depends upon the nature of the gas. The gas which is easily liquefiable will be easily adsorbed. The extent of adsorption depends upon the value of critical temperature. Lesser will be the value of critical temperature of gases. The value of adsorption will also be less.

Complete step by step solution:
-The extent of adsorption also depends upon the value of critical temperature. Higher the critical temperature maximum will be the adsorption. Lesser will be the value of critical temperature of gases, the value of adsorption will also be less. In the question the values of critical temperature are given so among them the least critical temperature is of ${{H}_{2}}$ which is 33. Hence it will show least adsorption.