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Question

The reagents most suitable for converting primary alcohol into an aldehyde is:

A
K2Cr2O7 and H2SO4
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B

KMnO4 and NaOH

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C
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D

HNO3

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Solution

The correct option is C
(a)
Potassium permanganate (KMnO4) is a powerful oxidant able to react with primary alcohol to form carboxylic acid.

(b) Similarly, K2Cr2O7 with H2SO4 act as a strong oxidizing agent that can change primary alcohols to carboxylic acid.

(c) By using mild oxidizing agents i.e., PDC or PCC, we can convert primary alcohols to aldehyde.


(d) RCH2OHHNO3−−−RCOOH
\ HNO3 is a strong oxidizing agent; therefore it converts primary alcohol into a carboxylic acid.

Hence, the correct option is (c).

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