Question

Which of the following oxidising agent is used to convert ethanol to ethanal?

• A. Acidified \(KMnO_4\)
• B. Alkaline \(KMnO_4\)
• C. Acidified \(K_2Cr_2O_7\)
• D. \(H_2O_2\) in anhydrous medium
• E. \(CrO_3\) in anhydrous medium

Hint:

Standard reagents to convert alcohol \(\to\) aldehyde: PCC (Pyridinium Chlorochromate) or \(CrO_3\) in anhydrous medium. Using acidified \(KMnO_4\) will "overshoot" the reaction to the carboxylic acid.

Answer 1

Answer: (E)