Q.

Empirical formula of a compound is CH2O and its vapour density is 30. Molecular formula of the compound is

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a

C2H6O3

b

C2H4O2

c

C2H4O

d

CH2O

answer is B.

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Detailed Solution

Empirical formula = CH2O Empirical formula mass = 12 + 2 + 16 = 30 Mol. mass = 2 × V.D. = 2 × 30=60 n = Mol. massEmperical mass = 6030 = 2 Molecular formula = (emperical formula)n = (CH2O)2=C2H4O2
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