Question

In the reaction, A$\frac{K_2Cr_2O_7}{H_2SO_4}$acetone$\xrightarrow{Oxidation}$acetic acid

Reactant A is:

Answer 1

Propan-2-ol

Answer 2

Acidified potassium dichromate oxidizes secondary alcohols to ketones. Acetone ($\text{CH}_3\text{COCH}_3$) is a ketone. The secondary alcohol that yields acetone upon oxidation is propan-2-ol ($\text{CH}_3\text{CH(OH)}\text{CH}_3$). The subsequent oxidation of acetone to acetic acid confirms the strong oxidizing conditions capable of further cleaving the ketone.