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Byju's Answer
Standard XII
Chemistry
Physical Properties of Haloarenes
In nucleophil...
Question
In nucleophilic addition reactions, the reactivity of carbonyl compounds follows order -
A
H
2
C
=
O
>
R
2
C
=
O
<
A
r
2
C
=
O
>
R
C
H
O
>
A
r
C
H
O
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B
H
2
C
=
O
>
R
C
H
O
>
A
r
C
H
O
>
R
2
C
O
>
A
r
2
C
=
O
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C
A
r
2
C
=
O
>
R
2
C
=
O
>
A
r
C
H
O
>
R
C
H
O
>
H
2
C
=
O
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D
A
r
C
H
O
>
A
r
2
C
=
O
>
R
C
H
O
>
R
2
C
=
O
>
H
2
C
=
O
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Solution
The correct option is
B
H
2
C
=
O
>
R
C
H
O
>
A
r
C
H
O
>
R
2
C
O
>
A
r
2
C
=
O
Reactivity decreases as crowding at carbonyl carbon increases.
Suggest Corrections
3
Similar questions
Q.
Assertion :
R
2
−
C
O
is more stable than
R
2
C
+
−
O
−
Reason: Resonance in carbonyl compound provides
C
+
and
O
−
Q.
Arrange the following compounds in decreasing order of reactivity towards nucleophilic addition reaction.
C
H
3
−
O
|
|
C
I
−
C
H
3
C
H
3
−
O
|
|
C
I
I
−
C
l
C
H
3
−
O
|
|
C
I
I
I
−
N
H
2
C
H
3
−
O
|
|
C
I
V
−
O
H
C
H
3
−
O
|
|
C
−
O
V
−
O
|
|
C
−
C
H
3
Q.
The reaction
R
C
N
S
n
C
l
2
/
H
C
l
−
−−−−−−
→
(
A
)
H
2
O
−
−
→
R
C
H
O
+
N
H
4
C
l
is known as:
Q.
The compound (D) is:
Q.
Consider following compounds and write total number of compounds which are less reactive than formaldehyde toward nucleophilic addition reaction.
C
H
3
−
O
|
|
C
−
H
(
i
)
;
C
H
3
−
O
|
|
C
−
C
H
3
(
i
i
)
;
E
t
−
O
|
|
C
−
H
(
i
i
i
)
C
H
3
−
C
H
2
−
C
H
2
−
O
|
|
C
−
H
(
i
v
)
;
P
h
−
O
|
|
C
−
C
H
3
(
v
)
;
P
h
−
O
|
|
C
−
P
h
(
v
i
)
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