Question

Alcohols (i) $CH_{3}CH_{2}CH_{2}OH$ (ii) $CH_{3} - CHOH - CH_{3}$ and (iii) $CH_{3} - C(CH_{3})(OH) - CH_{3}$ were treated with Lucas reagent (Conc. $HCl + ZnCl_{2})$ What results do you expect at room temperature?

• A. (ii) and (iii) react immediately and (i) in about 5 minutes
• B. (iii) reacts immediately, (ii) reacts in about 5 minutes and (i) not at all
• C. (i) reacts immediately, (ii) reacts in about 5 minutes and (iii) not at all
• D. (i) reacts in about 5 minutes, (ii) reacts in about 15 minutes and (iii) not at all

Answer 1

Answer: (B)

rate with Lucas reagent $3^{\circ}>\,2^{\circ}>\,1^{\circ}$