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Solution


Q.

Number of hydrogen atoms per molecule of a hydrocarbon A having 85.8% carbon is ________. (Given: Molar mass of A = 84 g mol-1)            [2023]

Ans.

(12)

C=85.812,   H=14.21

C7.15H14.2⇒CH2

                                                     n×EFmass=MFmass

14×n=84

         n=6

So, molecular formula=C6H12