Assertion (A): Vapour density = Density of gasDensity of hydrogen gas Reason (R): Vapour density is equal to 2 × molecular mass

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Assertion (A): $Vapour density = \frac{Density of gas}{Density of hydrogen gas}$

Reason (R): Vapour density is equal to $2 \times molecular mass$

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A is correct and R is incorrect.

Both A and R are correct and R is the correct explanation of A.

A is incorrect and R is correct.

Both A and R are correct but R is not correct explanation of A.

answer is C.

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Detailed Solution

$Vapour density = \frac{Density of gas}{Density of hydrogen gas}$

Actually, the correct relation between vapor density and molecular mass of any compound is shown below.

$Molecular mass = 2 \times Vapor density$

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