question_answer

Which of the following applies in the reaction, \[C{{H}_{3}}CHBrC{{H}_{2}}C{{H}_{3}}\xrightarrow{alc.\,KOH}\] (i) \[C{{H}_{3}}CH=CHC{{H}_{3}}\] (major product) (ii) \[C{{H}_{2}}=CHC{{H}_{2}}C{{H}_{3}}\] (minor product) [Orissa JEE 2005]

A) Markovnikov's rule

B) Saytzeff's rule

C) Kharasch effect

D) Hofmann's rule

Correct Answer: B

Solution :

If the dehydrohalogenation of an alkyl halide can yield more than one alkene, then according to the saytzeff rule, the main product is the most highly substituted alkene.