JSM Learn -   Q. Elimination reaction of 2-Bromo-pentane to form pent-2-ene is:     (a) β-Elimination reaction                       (b) Follows Zaitsev rule     (c) Dehydrohalogenation reaction        (d) Dehydration reaction     (1) (b), (c), (d)       (2) (a), (b), (d)            (3) (a), (b), (c)               (4) (a), (c), (d)

Q. Elimination reaction of 2-Bromo-pentane to form pent-2-ene is:

    (a) β-Elimination reaction                       (b) Follows Zaitsev rule

    (c) Dehydrohalogenation reaction        (d) Dehydration reaction

    (1) (b), (c), (d)       (2) (a), (b), (d)            (3) (a), (b), (c)              (4) (a), (c), (d)

Ans. (3)

Explanation:

(i) HBr is eliminated, so it is a dehydrohalogenation reaction.

(ii) It is a β-elimination reaction since H from β-carbon is eliminated along with Br.

(iii) Highly substituted alkene is formed as major product, so it follows zaitsev rule.