On the basis of data given below predict which of the following gases shows the least adsorption on a definite amount of charcoal?
$\begin{matrix} Gas & C O_{2} & S O_{2} & C H_{4} & H_{2} Critical T (K) & 304 & 630 & 190 & 33 \end{matrix}$

C O_{2}

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S O_{2}

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C H_{4}

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H_{2}

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Solution

The correct option is B $S O_{2}$
Higher the critical temperature, greater will be the van der Waals forces of attraction and also the extent of adsorption.
The nature of gas defines the amount of gas adsorbed by the solid. Hence easily liquefiable gases (gases having higher critical temperatures) are easily adsorbed as the Vander walls forces tends to be strong near the critical temperature values.
Hence from above option $H_{2} (33) i s h a v i n g l o w e r c r i t i c a l t e m p e r a t u r e, h e n c e i t w i l l b e l e a s t a d s o r b e d o n c h a r c o a l$

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Similar questions

C O_{2}

S O_{2}

C H_{4}

H_{2}

Gas	$C O_{2}$	$S O_{2}$	$C H_{4}$	$H_{2}$
Critical temp./K	304	630	190	33

C O_{2}

S O_{2}

C H_{4}

H_{2}

Gas	$H_{2}$	$C H_{4}$	$C O_{2}$	$S O_{2}$
Critical Temperature $(K)$	$33$	$190$	$304$	$630$

Gas	$C O_{2}$	$S O_{2}$	$C H_{4}$	$H_{2}$
Critical temp./K	$304$	$630$	$190$	$33$

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