What is the correct order of reactivity of alcohols in the following reaction? 

R - OH   +    HCl R - Cl   +   H₂O

I. 1° > 2° > 3°

II. 1° < 2° > 3° 

III. 3° > 2° > 1°

IV. 3° > 1° > 2° 

This is a multiple choice answer as classified in NCERT Exemplar

(III) 3° > 2° > 1° 

Alcohols are classified as primary, secondary and tertiary by lucas reagent which is a mixture of concentrated HCl and dry anhydrous ZnCl₂. The carbocation is formed as the intermediate during the lucas test of alcoh