The perfect gas equation for $4 g$ of hydrogen gas is

P V = R T

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P V = 2 R T

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P V = \frac{1}{2} R T

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P V = 4 R T

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Solution

The correct option is A $P V = 2 R T$
Number of moles of a substance=Total weight of substance/Molecular weight of substance
$⟹ n = W / M_{0}$
$= \frac{4}{2} m o l$
$= 2 m o l$
Hence the Ideal Gas equation becomes $P V = n R T$
$⟹ P V = 2 R T$

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