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Byju's Answer
Standard XII
Chemistry
Hydrohalogenation of Alkenes
Primary alcoh...
Question
Primary alcohols can be obtained from the reaction of
R
M
g
X
followed by hydrolysis with:
A
C
O
2
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B
H
C
H
O
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C
C
H
3
C
H
O
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D
H
2
O
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Solution
The correct option is
C
H
C
H
O
For HCHO,
R
M
g
X
+
H
C
H
O
⟶
R
C
H
2
O
H
For
C
H
3
C
H
O
R
M
g
X
+
C
H
3
C
H
O
⟶
R
(
C
H
3
)
C
H
O
H
For
H
2
O
R
M
g
B
r
+
H
2
O
⟶
R
H
+
M
g
(
O
H
)
B
r
For
C
O
2
R
M
g
B
r
+
C
O
2
⟶
R
C
O
O
H
All reactions are followed by hydrolysis to give respective compounds.
Only for
H
C
H
O
, primary alcohol is produced.
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Similar questions
Q.
Primary alcohols are obtained by the reaction of Grignard reagent with:
Q.
When
C
H
3
C
H
O
is treated with excess of HCHO in aqueous solution of
N
a
2
C
O
3
, a product, used in making explosive, is obtained finally. Find the number of primary alcoholic groups present in one molecule of the product.
Q.
Which of the following reactants give primary alcohol as a major product when reacts with
R
M
g
X
followed by acidification?
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.
[1 Mark]
Q.
In the following reaction,
A
l
d
e
h
y
d
e
+
A
l
c
o
h
o
l
H
C
l
−
−
→
A
c
e
t
a
l
Aldehyde
Alcohol
H
C
H
O
t
−
B
u
O
H
C
H
3
C
H
O
M
e
O
H
The best combinations are:
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