Q.

Two vessels A and B having equal volume contain equal masses of hydrogen in A and helium in B at 300 K. Then mark the correct statement

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a

the pressure exerted by hydrogen is half that exerted by helium

b

the pressure exerted by hydrogen is equal to that exerted by helium

c

average KE of the molecules of hydrogen is half the average KE of the molecules of helium

d

 the pressure exerted by hydrogen is twice that exerted by helium

answer is D.

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Detailed Solution

PV =nRT =mM0RT here V same m same so pressure is inversely proportional to molecular weight

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