Question

Chlorobenzene can be converted into phenol by heating in aqueous sodium hydroxide solution at a temperature of $623 \,K$ and a pressure of $300\,atm$. However the rate of reaction can be increased by presence of certain groups in benzene ring. What will be the order of reactivity of following compounds towards the above substitution reaction? undefinedundefined

• A. $(iii) > (ii) > (i)$
• B. $(ii) > (iii) > (i)$
• C. $(i) > (ii) > (iii)$
• D. $(i) > (iii) > (ii)$

Answer 1

Answer: (A)

$(iii) > (ii) > (i)$

Answer 2

The presence of an electron withdrawing group $(-NO_2)$ at ortho and $para$-positions increases the reactivity of haloarenes.