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Byju's Answer
Standard XII
Chemistry
Resonance Effect
Which one of ...
Question
Which one of the following is least stable resonating structure?
A
N
H
2
−
O
|
|
C
−
O
−
C
H
3
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B
⊖
⊕
N
H
2
=
O
|
C
−
O
C
H
3
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C
⊖
N
H
2
−
O
|
C
⊕
−
O
C
H
3
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D
⊖
N
H
2
−
O
|
C
=
O
⊕
−
C
H
3
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Solution
The correct option is
C
⊖
N
H
2
−
O
|
C
⊕
−
O
C
H
3
⊖
N
H
2
−
O
|
C
⊕
−
O
C
H
3
This is least stable as an octet of one carbon is incomplete, also it has lesser number of sigma bonds.
Option C is correct.
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Similar questions
Q.
Identify the stronger base :
C
H
3
−
O
∥
C
−
N
H
2
or
C
H
3
N
H
2
Q.
C
H
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−
N
H
|
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C
(
1
)
−
N
H
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,
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(
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|
C
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N
H
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The correct order of the basicities of the following compounds is:
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
−
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|
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C
I
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l
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H
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C
I
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I
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N
H
2
C
H
3
−
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C
I
V
−
O
H
C
H
3
−
O
|
|
C
−
O
V
−
O
|
|
C
−
C
H
3
Q.
Which of the following will show a ‘+M’ effect (positive mesomeric effect)
(i)
C
H
3
(ii)
−
C
l
(iii)
−
N
H
2
(iv)
−
O
H
(v)
−
O
C
H
3
(vi)
−
C
=
O
(vii)
−
C
N
Q.
C
H
3
−
O
|
|
C
−
N
H
2
+
4
(
H
)
N
a
⟶
E
t
h
a
n
o
l
X
The compound
X
is:
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