Byju's Answer
Standard XII
Chemistry
Alcohols as Nucleophiles and Electrophiles
The reagents ...
Question
The reagents most suitable for converting primary alcohol into an aldehyde is:
A
K
2
C
r
2
O
7
and
H
2
S
O
4
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B
K
M
n
O
4
and
N
a
O
H
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C
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D
H
N
O
3
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Solution
The correct option is
C
(a)
Potassium permanganate (KMnO
4
) is a powerful oxidant able to react with primary alcohol to form carboxylic acid.
(b) Similarly, K
2
Cr
2
O
7
with H
2
SO
4
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)
R
−
C
H
2
−
O
H
H
N
O
3
−
−−−
→
R
−
C
O
O
H
\
HNO
3
is a strong oxidizing agent; therefore it converts primary alcohol into a carboxylic acid.
Hence, the correct option is (c).
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Q.
Assertion (A):
C
H
3
C
H
2
O
H
can be converted into
C
H
3
C
H
O
by treatment with pyridinium chlorochromate.
Reason (R): PCC is a better reagent for oxidation of primary alcohols to aldehydes.
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Alcohols as Nucleophiles and Electrophiles
Standard XII Chemistry
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