JEE Main & Advanced Chemistry Hydrocarbons Question Bank Critical Thinking

  • question_answer Formation of 2-butene as major product by dehydration of 2-butanol is according to [MP PMT 1995]

    A) Markownikoff rule

    B) Saytzeff rule

    C) Peroxide effect

    D) Anti-Markownikoff rule

    Correct Answer: B

    Solution :

      \[\underset{2-\text{Butanol}}{\mathop{C{{H}_{3}}\underset{OH\,}{\mathop{-\underset{|}{\mathop{C}}\,H-}}\,C{{H}_{2}}-C{{H}_{3}}}}\,\to \]\[\underset{2-\text{Butene}}{\mathop{C{{H}_{3}}-CH=CH-C{{H}_{3}}}}\,\]\[+{{H}_{2}}O\] According to this rule H atom goes from that b - carbon which is less hydrogenated.

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