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MEDIUMMCQ SINGLEJEE Mains ChemistryPhysical ChemistryMole _ Equivalent ConceptMolecular Formula

A gas has molecular formula (CH)n. If vapour density of  the  gas  is  39,  what  should  be  the  formula  of  the compound?

A.CH₄
B.C₃H₈
C.C₂H₆
D.C₆H₆✓ Correct
Explanation

Molecular weight = 2 × V.D. = 2 × 39 = 78 (CH)n = (13)n or 13 × n = 78 78 n 6 13 Molecular formula = C₆H₆

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