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Byju's Answer
Standard XII
Chemistry
Preparation of Alcohols from Carbonyl Compounds
Name the reag...
Question
Name the reagents used in the following reactions
(i)
C
H
3
−
C
O
−
C
H
3
→
C
H
3
−
C
H
−
C
H
3
|
O
H
(ii)
C
6
H
5
−
C
H
2
−
C
H
3
→
C
6
H
5
−
C
O
O
−
K
+
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Solution
(i)Sodium borohydride
(
N
a
B
H
4
)
(ii) Alkaline potassium permanganate
(
K
M
n
O
4
−
K
O
H
)
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Similar questions
Q.
Which is the stronger acid in each of the following pairs?
(i)
C
H
3
−
C
O
O
H
and
C
H
2
=
C
H
−
C
O
O
H
(ii)
C
6
H
5
−
C
O
O
H
and
C
6
H
5
−
C
H
2
−
C
O
O
H
(iii)
C
H
3
−
C
H
2
−
C
O
O
H
and
C
H
3
−
C
H
|
O
H
−
C
O
O
H
.
Q.
Identify the type of the following reaction of carbon compounds.
a. CH
3
-CH
2
-CH
2
-OH → CH
3
-CH
2
-COOH
b. CH
3
-CH
2
-CH
3
→ 3CO
2
+ 4H
2
O
c. CH
3
-CH = CH -CH
3
+ Br
2
→ CH
3
-CHBr - CHBr -CH
3
d. CH
3
-CH
3
+ Cl
2
→ CH
3
-CH
2
-Cl + HCl
e. CH
3
-CH
2
-CH
2
-CH
2
-OH → CH
3
-CH
2
-CH=CH
2
+ H
2
O
f. CH
3
-CH
2
-COOH + NaOH → CH
3
-CH
2
-COO - Na
+
+ H
2
O
g. CH
3
-COOH + CH
3
-OH → CH
3
-COO- CH
3
+ H
2
O
Q.
Which pair of the following carbonyl compounds can be differentiated by
I
2
/
N
a
O
H
?
Q.
Following is the list of four halides. Select correct sequence of decreasing order of reactivity for
S
N
1
reaction using the codes given below.
I)
C
6
H
5
−
C
|
H
C
H
3
−
B
r
II)
C
6
H
5
−
C
H
2
−
B
r
III)
C
6
H
5
−
C
|
H
C
H
3
−
I
IV)
C
6
H
5
−
C
H
2
−
I
Q.
Consider the following Carbocations :
I)
C
6
H
5
←
C
H
2
II)
C
6
H
5
←
C
H
2
C
H
2
III)
C
6
H
5
←
C
H
←
C
H
3
IV)
C
6
H
5
←
C
(
C
H
3
)
2
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