question_answer

The reaction/method that does not give an alkane is:

A) catalytic hydrogenation of alkenes

B) Wurtz reaction

C) hydrolysis of alkyl magnesium bromide

D) Kolbes electrolytic method

E) dehydrohalogenation of an alkyl halide

Correct Answer: E

Solution :

Dehydrohalogenation of an alkyl halide does not give an alkane because it gives alkenes as, \[H-\underset{\begin{smallmatrix}  | \\  H \end{smallmatrix}}{\overset{\begin{smallmatrix}  H \\  | \end{smallmatrix}}{\mathop{C}}}\,-C=\overset{\begin{smallmatrix}  H \\  | \end{smallmatrix}}{\mathop{C}}\,-H+KBr+{{H}_{2}}O\]