(3) 3-6x 1023(4) 3.5 X 102 If air contains nitrogen and oxygen gases i – InterviewSolution

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1.

(3) 3-6x 1023(4) 3.5 X 102 If air contains nitrogen and oxygen gases in the volume ratio 4: 1. The vapour density/of air is:14 2η□(1) 145(3) 16.5(2) 15(4) 18The molecular weight of gas is

Answer»

Molecular weight of N2 ~ 14x2 => 28Molecular weight of O2 ~ 16x2 => 32

0.8*28 + 0.2*32 => 28.8

Relative to H2 (~2), this is28.8 / 2 => 14.4

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