What is the final product when Butanol reacts with Jones reagent in the presence of acetone?

Butanoic acid

The correct answer is option 3. Butanoic acid.

When butanol (1-butanol) reacts with Jones reagent in the presence of acetone, it undergoes oxidation. Jones reagent is a mixture of chromium trioxide (\(\text{CrO}_3\)) and dilute sulfuric acid (\(\text{H}_2\text{SO}_4\)) in aqueous acetone. It is a strong oxidizing agent that typically oxidizes primary alcohols to carboxylic acids and secondary alcohols to ketones.

Reaction with 1-Butanol:

Since Jones reagent is a strong oxidizing agent, it fully oxidizes primary alcohols all the way to carboxylic acids, bypassing the aldehyde stage as an intermediate. The final product of the reaction is butanoic acid.