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Question

The volumes of gases H2,CH4,CO2 and NH3 absorbed by 1 g of charcoal at 288 K are in the order:


A
H2 > CH4 > CO2 > NH3
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B
CH4 > CO2 > NH3 > H2
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C
CO2 > NH3 > H2 > CH4
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D
NH3 > CO2 > CH4 > H2
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Solution

The correct option is D NH3 > CO2 > CH4 > H2


Greater is the critical temp. of a gas, greater is the adsorption. Critical temp. (K) are NH3 (406), CO2 (304), CH4 (190) H2 (33). Thus, adsorption decreases from NH3 to H2 in this order.


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