The gas which is least absorbed on charcoal (under identical conditions) is :

H C l

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O_{2}

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C O_{2}

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N H_{3}

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Solution

The correct option is B $O_{2}$
Permanent gases such as $O_{2}, H_{2}$ are adsorbed to a lesser extent than the easily liquefiable gases such as $N H_{3}, H C l, C O_{2}$ and $S O_{2}$

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The volumes of gases $H_{2}, C H_{4}, C O_{2} a n d N H_{3}$ absorbed by 1 g of charcoal at 288 K are in the order:

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The volumes of gases $H_{2}, C H_{4}, C O_{2} a n d N H_{3}$ absorbed by 1 g of charcoal at 288 K are in the order:

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