Classification and nomenclatureMedium

Question

Identify the correct IUPAC name of hydrocarbon (x) containing three primary carbon atoms and with molar mass $72\text{ }g{\text{ }mol}^{- 1}$.

Options

A.1,1-Dimethylcyclopropane

B.2,2-Dimethylpropane

C.2-Methylbutane

D.n-pentane

Solution

Sol. [Key Concept: Molar mass $72$ means $C_{5}H_{12}$; the isomer with exactly three primary carbons is $2$-methylbutane.]

(A)

(B)

(C)

(D)

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