Question

Toluene is oxidised to benzoic acid by

• A. $KMn{O}_4$
• B. $K_{2}C{r}_2{O}_7$
• C. $H_{2}S{O}_4$
• D. Both (a) and (b)

Answer 1

Answer: (D)

Both (a) and (b)

When toluene is refluxed with alkaline $KMn{O}_4$ solution, it is oxidised to benzoic acid. The acid is usually obtained in solution as its salt due to the alkaline nature of the reaction mixture.

$K_{2}C{r}_2{O}_7$ to carboxylic acids and ketones respectively. The oxidation is physically observed by the change in color upon reduction of $C{r}^{+6}$ (yellow) to $C{r}^{3+}$(blue).

Hence , Option D is a correct answer.