Question

An organic compound $A$ of molecular formula $C_2{H}_{6}O$ on oxidation with dilute alkaline $KMn{O}_4$ solution gives an acid $B$ with same number of carbon atoms. Compound $A$ is often used for sterilisation of skin by doctors. Choose the incorrect statement among the following.

• A. Compound $A$ is ethanol
• B. Compound $B$ is ethanoic acid
• C. Compound $A$ is acetone
• D. Compound $B$ is a prime component of vinegar

Answer 1

The correct option is C Compound $A$ is acetone

Compound $A$ is ethanol which upon oxidation gives acetic acid $\left(B\right)$.
The chemical equation involved is:
$\underset{A}{\underset{Ethanol}{C_2{H}_{5}OH}}\stackrel{Alk.KMn{O}_4}{\to }\underset{B}{\underset{\text{Ethanoic acid}}{C{H}_{3}COOH}}$

Ethanol is generally used to disinfect skin and is a common medical alcohol.
Vinegar is an aqueous solution of acetic acid.