MEDIUMMCQ SINGLENEET 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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