The correct relation between the density $(d)$ , temperature $(T)$ and pressure $(P)$ for an ideal gas having molar mass $(M)$ is given by

P M = \frac{R T}{d}

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P M = d R T

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\frac{P}{M} = d R T

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\frac{M}{d} = \frac{R T}{P}

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Solution

The correct option is B $P M = d R T$
The ideal gas equation is
$P V = n R T \Rightarrow P V = \frac{W}{M} R T (∵ W = weight of the gas; M = Molecular mass) \Rightarrow P M = \frac{W}{V} R T \Rightarrow P M = d R T$

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