Question

$RCH_{2}OH+CrO_{3}\overset{aq . H_{2} SO_{4}}{ \rightarrow }Z+Cr^{x +}$
The oxidation number $x$ of $Cr$ will be

Answer 1

Chromic acid, also known as Jones reagent, is prepared by adding chromium trioxide to aqueous sulphuric acid. The Jones reagent oxidises primary alcohols to carboxylic acids.
$\underset{\left(\right. Orange \, Solution \left.\right)}{\underbrace{\underset{\left(\right. 1 ° \, Alcohol \left.\right)}{\left(RCH\right)_{2} OH}}}+CrO_{3}\overset{Aq . \, H_{2} \left(SO\right)_{4}}{ \rightarrow }\underset{\left(\right. Greenish \, opaque \, solution \left.\right)}{\underset{\left(\right. Z \left.\right)}{RCOOH}}+\left(Cr\right)^{3 +}$