A) \[Cr{{O}_{3}}\]in anhydrous medium
B) \[KMn{{O}_{4}}\]in acidic medium
C) Pyridinium chlorochromate
D) Heat in presence of Cu at 573K
Correct Answer: B
Solution :
\[KMn{{O}_{4}}\]will oxidise initially formed aldehydes to carboxylic acids. Remaining all the three reagents can be used to oxidise primary alcohols to aldehydes.
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