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.
A
The pressure exerted by hydrogen is half that exerted by helium.
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B
The pressure exerted by hydrogen is equal to that exerted by helium.
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C
Average KE of he molecules of hydrogen is half the average KE of the molecules of helium.
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D
The pressure exerted by hydrogen is twice that exerted by helium.
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Solution
The correct option is D The pressure exerted by hydrogen is twice that exerted by helium. PV=μRT PH2=mMH2RTV,PHe=mMHeRTV ∴PH2PHe=42=2
Hence the correct answer is option (d).