question_answer

Identify the incorrect statement/statements:

(i) Alkynes are more reactive than alkenes towards electrophilic addition reaction

(ii) Alkynes are less reactive than alkenes towards electrophilic addition reaction

(iii) Alkynes decolourise \[B{{r}_{2}}\] water

(iv) Addition of HBr to alkynes in presence of peroxide proceeds via Markownikoff's rule

A) (i) and (ii)          

B) (ii) and (iii)

C) (i) and (iv)         

D) (ii) and (iv)

Correct Answer: C

Solution :

[c] More is the s-character more is its electrophilic nature out of alkenes and alkyne. Thus alkynes are more reactive than alkenes towards nucleophilic reaction and reactive towards the electrophilic reaction. Addition of \[H{{B}_{r}}\]in the presence of peroxide follows anti-markownikoff??s Rule.