The empirical formula of an organic gas containing carbon and hydrogen is CH₂. The mass of 1 litre of this organic gas is exactly equal to that of 1 litre of N₂. Therefore, the molecular formula of organic compound is:

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C₆H₁₂

C₄H₈

C₂H₄

C₃H₆

answer is C.

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Detailed Solution

Molecular mass of the gas = Molecular mass of N₂ = 28 g

Molecular formula mass = n X (Empirical formula mass)

Empirical formula mass of the gas = 12 + 2 = 14 g

Therefore, n = 28/14 = 2

Hence the molecular formula is (CH₂)₂ or C₂H₄.

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