Question

A better reagent to oxidize primary alcohols into aldehyde is :

• A. PCC
• B. Alkaline KMnO₄
• C. Acidified K₂Cr₂O₇
• D. CrO₃

Answer 1

The Correct Option is A

The oxidation of primary alcohols to aldehydes requires a reagent that selectively oxidizes the alcohol without further oxidizing the aldehyde to a carboxylic acid.

PCC (Pyridinium chlorochromate) is a better reagent for this purpose because it efficiently oxidizes primary alcohols to aldehydes without over-oxidation to carboxylic acids. This makes PCC particularly useful in synthetic organic chemistry.

Other oxidizing agents, such as potassium permanganate (KMnO₄) or chromic acid (H₂CrO₄), tend to further oxidize aldehydes to carboxylic acids. Therefore, PCC is preferred for selective oxidation of primary alcohols to aldehydes.

Conclusion: The better reagent to oxidize primary alcohols to aldehydes is PCC (Pyridinium chlorochromate).