Multiple choice

Regarding addition reactions, which of the following statements is/are correct?

  1. Addition reactions are thermodynamically favourable at high temperatures.
  2. pi-Bonds act as nucleophile in the addition reaction to an alkene.
  3. In the addition reaction of HI to 2-methyl-2-butene, the addition of hydrogen takes place at C3.

  1. Only 1

  2. Only 2

  3. Only 3

  4. 1 and 2

  5. 2 and 3
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Addition reactions are thermodynamically favourable at low temperatures. pi-Bonds plays the role of nucleophile in the addition reaction to an alkene. In the addition reaction of HI to 2-methyl-2-butene, the Marconicov’s addition mechanism involves the formation of carbocation at C-3 due to the presence of high density of hydrogen atoms (Markonicov’s rule).

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