MCQ
Which one of the following alkenes will react fastest with $H_2$ under catalytic hydro-genation condition

  • B

  • C

  • D

Answer

Correct option: A.

a
$(a)$ According to saytzeff rule order of stability is

${}_H^H > C = C\, < \,_H^H$    ${}_R^R > C = C\, < \,_H^R$

${}_R^R > C = C\, < \,_H^H$    ${}_H^R > C = C\, < \,_H^R$

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