The order of reactivity of the following alcohols towards conc. HCl is:

Question

The order of reactivity of the following alcohols towards conc. HCl is: (A)  I>II>III>IV  (B)  I>III>II>IV  (C)  IV>III>II>I  (D)  IV>I>II>III

Tardigrade Admin · Accepted Answer

This is nucleophilic substitution reaction, hence stabler the carbocation, more reactive will be the alcohol. The order of stability of carbocations is: Ph- overset+ mathopC H2>CH3- overset+ mathopC H-CH3 >FCH2-CH2- overset+ mathopC H-CH3 >FCH2- overset+ mathopC H-CH3

Q. The order of reactivity of the following alcohols towards conc. $H Cl$ is:

$I > II > III > I V$

$I > III > II > I V$

$I V > III > II > I$

$I V > I > II > III$

This is nucleophilic substitution reaction, hence stabler the carbocation, more reactive will be the alcohol. The order of stability of carbocations is: $P h - C + H_{2} > C H_{3} - C + H - C H_{3}$ $> FC H_{2} - C H_{2} - C + H - C H_{3}$ $> FC H_{2} - C + H - C H_{3}$

Q. The order of reactivity of the following alcohols towards conc. HCl is:

I>II>III>IV

I>III>II>IV

IV>III>II>I

IV>I>II>III