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Byju's Answer
Standard XII
Chemistry
Resonance
In which of t...
Question
In which of the following, resonance will be possible?
A
C
H
2
=
C
H
–
C
H
2
–
C
H
O
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B
C
H
2
=
C
H
–
C
H
=
O
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C
C
H
3
C
O
C
H
3
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D
C
H
2
=
C
H
–
C
H
2
–
C
H
=
C
H
2
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Solution
The correct option is
B
C
H
2
=
C
H
–
C
H
=
O
Resonance happens in a conjugated system.
Suggest Corrections
2
Similar questions
Q.
I
.
⊖
C
H
2
−
⊕
C
H
−
C
H
=
C
H
−
O
−
C
H
3
I
I
.
⊖
C
H
2
−
C
H
=
C
H
−
⊕
C
H
−
O
−
C
H
3
I
I
I
.
C
H
2
=
C
H
−
⊖
C
H
−
⊕
C
H
−
O
−
C
H
3
I
V
.
C
H
2
=
C
H
−
⊖
C
H
−
C
H
=
⊕
O
−
C
H
3
C
H
2
=
C
H
−
C
H
=
C
H
−
O
−
C
H
3
has the following above resonating structures.
The correct order of stability of these resonating structures is:
Q.
Arrange the following in increasing order of stability on the basis of resonance.
(i)
C
H
2
=
C
H
−
C
H
=
C
H
−
+
C
H
2
(ii)
C
H
2
=
C
H
−
+
C
H
−
C
H
=
C
H
2
(iii)
C
H
2
=
C
H
−
+
C
H
−
−
C
H
−
+
C
H
2
(iv)
+
C
H
2
−
C
H
=
C
H
−
−
C
H
−
+
C
H
2
.
Q.
Which has more resonance energy in question?
C
H
2
=
C
H
−
⊖
O
and
C
H
2
=
C
H
−
O
H
.
Q.
Which of the following lone-pair indicated is not involved in resonance?
(A)
C
H
2
=
C
H
−
.
.
N
H
−
C
H
3
(B)
C
H
2
=
C
H
−
.
.
O
.
.
−
C
H
3
(C)
C
H
2
=
C
H
−
.
.
O
.
.
−
C
H
=
C
H
2
(D)
C
H
2
=
C
H
−
N
H
2
Q.
Resonance structures of propenal are given below. Which of these resonating structure is more stable? Give reason for your answer.
C
H
2
=
C
H
−
C
H
=
O
I
⟷
⊕
C
H
2
−
C
H
=
C
H
−
⊝
O
I
I
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