Question

Which of the following reacts fastest with a mixture of anhydrous $ZnC{l}_2$ and conc. $HCl$ ?

• A. Trimethyl carbinol
• B. Ethanol
• C. Propanol
• D. Methanol
• E. Isopropanol

Answer 1

Answer: (A)

Reactivity order of alcohols towards $ZnC{l}_2$ and conc. $HCl$ is ter. Alcohol > sec alcohol > pri alcohol Trimethyl carbinol is $C{H}_3\underset{\begin{array}{c}|\\ C{H}_3\end{array}}{\stackrel{\begin{array}{c}C{H}_3\\ |\end{array}}{C}}OH$ . It is tertiary alcohol.