A and B are ideal gases. The molecular weights of A and B are in the ratio of 1: 4. The pressure of a gas mixture containing equal weights of A and B is Patm. What is the partial pressure (in atm) of B in the mixture.
A
P5
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B
P2
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C
P2.5
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D
3P4
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Solution
The correct option is BP5 PB=P.XB
No. of moles of gas is inversely proportional to molecular weight when an equal mass of gases are present.
Thus, no. of moles of A and B are in the ratio 4: 1