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Question

Which of the following gases present in a polluted area will be adsorbed most easily on the charcoal gas mask ?

A
H2
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B
O2
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C
N2
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D
SO2
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Solution

The correct option is D SO2
One of the application of adsorption of gas on charcoal is gas masks. They have activated charcoal in it so that they adsorb gases.

The amount of gas adsorbed by a solid depends on the nature of gas.
In general, easily liquefiable gases will have higher critical temperatures are readily adsorbed as van der Waals' forces are stronger near the critical temperatures.
Here, SO2 is having the maximum critical temperature and hence it gets adsorbed most easily on the charcoal gas mask than elemental gases H2, O2 and N2.

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