A gas mixture contains methane (CH4, 16) and oxygen (O2, 32) in a mass ratio 1 : 4. The density of the mixture at STP (22.4 L/mol) is

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JEE Advanced levelSingle correct optionDifficulty 3 of 3mc146

A gas mixture contains methane ( $CH X_{4}$ , 16) and oxygen ( $O X_{2}$ , 32) in a mass ratio 1 : 4. The density of the mixture at STP (22.4 L/mol) is

A $1.07 g L^{- 1}$
B $1.19 g L^{- 1}$
C $0.95 g L^{- 1}$
D $1.29 g L^{- 1}$

Answer: B

Per 5 g: methane = 1/16 = 0.0625 mol, oxygen = 4/32 = 0.125 mol. Total 0.1875 mol. x(CH4) = 0.333. Mean M = 5/0.1875 = 26.67 g/mol. Density = 26.67/22.4 = 1.19 g/L.

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A gas mixture contains methane (CHX4​, 16) and oxygen (OX2​, 32) in a mass ratio 1 : 4. The density of the mixture at STP (22.4 L/mol) is

Answer: B

More questions on Mole, molar mass, Avogadro number and molar volume

A gas mixture contains methane ( $CH X_{4}$ , 16) and oxygen ( $O X_{2}$ , 32) in a mass ratio 1 : 4. The density of the mixture at STP (22.4 L/mol) is