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JEE Main levelOne or more correct optionsDifficulty 2 of 3ig087

Which of the following statements are correct?

AVapour density of $CO X_{2}$ is 22
BDensity of a gas in $g L^{- 1}$ at STP equals its molar mass divided by 22.4
CVapour density of a gas is independent of temperature and pressure
DMolar mass equals half the vapour density

Answer: A, B, C

Vapour density

= M /2

: for

CO X_{2}

,

44/2 = 22

(A). Density at STP

= M /22.4

(B). Vapour density is a ratio of two densities measured at the same

T

and

P

, so it is a constant for the gas (C). Molar mass is twice the vapour density, not half (D wrong).

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