A mixture of N2 and CO2 has vapour density 17. The mole fraction of CO2 is (N = 14, C = 12, O = 16)

JEE Main levelSingle correct optionDifficulty 2 of 3mc206

A mixture of $N X_{2}$ and $CO X_{2}$ has vapour density $17$ . The mole fraction of $CO X_{2}$ is (N = 14, C = 12, O = 16)

M(mix) = 2 x 17 = 34. Let x be the mole fraction of CO2: 44x + 28(1 - x) = 34, so 16x = 6 and x = 0.375.

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