Question

Which of the following reagents can not be used to oxidize primary alcohols to aldehydes?

• A. $CrO_{3}$ in anhydrous medium.
• B. $KMnO_{4}$ in acidic medium
• C. Pyridinium chlorochromate
• D. Heat in the presence of Cu at 573 K

Answer 1

Answer: (B)

$KMnO_{4}$ in acidic medium

Answer 2

$KMnO_{4}$ will oxides initially formed aldehydes to carboxylic acids.