question_answer

Which one of the following contain isopropyl group?

A)  2, 2, 3, 3-tetramethylpentane

B)  2-methylpentane

C)   2, 2, 3-trimethylpentane

D)  3, 3-dimethylpentane

Correct Answer: B

Solution :

                 Key Idea: Isopropyl group means one methyl group is present on 2nd carbon on longest chain of carbon atom. Draw the structure as name given in choices and find the answer