A mixture of H2 and O2 gases in a cylinder contains 10gH2 and 64g of O2. If the total pressure of the mixture of the gases in the cylinder is 35bar, the partial pressure of H2 gas is
A
2bar
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B
5bar
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C
25bar
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D
20bar
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Solution
The correct option is C25bar nH2=102=5mol,nO2=6432=2mol χH2=nH2nH2+nO2=55+2=57 PH2=p.χH2=35×57=25bar PO2=(32−PH2) =(35−25)=10bar