Question

Which pair of the following gives the nature of reaction sequences given below?

• A. Electrophilic addition and electrophilic substitution
• B. Electrophilic addition and nucleophilic substitution
• C. Nucleophillic addition and electrophilic substitution
• D. Nucleophilic addition and free radical substitution

Answer 1

The correct option is B Electrophilic addition and nucleophilic substitution

$C{H}_3-CH=CH-C{H}_3+HI\stackrel{C{H}_{3}COOH}{\to }\underset{I}{\underset{|}{C{H}_{3}C{H}_{2}CH-C{H}_3}}$
(electrophillic addition reaction)

$\underset{I}{\underset{|}{C{H}_{3}C{H}_{2}CH-C{H}_3}}+NaOH(aq.)⟶\underset{OH}{\underset{|}{C{H}_{3}C{H}_{2}CH-C{H}_3}}$
(nucleophillic substitution reaction)