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The partial pressure of a gas X is given by two bar, where is the total pressure of the gaseous mixture in a cylinder is 10 bar. What is the mole fraction of the gas X in that mixture?(a) 0.5(b) 2(c) 0.2(d) 5I had been asked this question in an interview.This interesting question is from States of Matter in division States of Matter of Chemistry – Class 11

Answer»

The correct choice is (C) 0.2

To explain I would say: The partial pressure of a gas equals the mole fraction of the gas in the gaseous mixture X the TOTAL pressure that is exerted by the gaseous mixture. So here 2 bar =MOLAR fraction x 10 bar, we get that the mole fraction is 2/10 = 0.2.



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