Resonance Worksheet Page 2

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Q.4 Which of the following is not a valid resonance structure of the other
three ?
(a)
(b)
(c)
(d)
Q.5 Which of the following is not a resonance structure of the rest ?
+
+
+
O
O
O
O
O
O
N
N
N
+
+
+
(A)
(B)
(C)
(D)
NO
NO
NO
2
2
2
+
H
H
H
Q.6 Among the following four structures, one is not a permissible
resonance form. Identify the wrong structure ?
(A)
(B)
(C)
(D)
Q.7 Which of the following is(are) valid as resonance structures of the
pentadienyl cation ?
(i) CH
= CH – CH = CH – C
H
2
2
(ii) CH
= CH – C
H – CH = CH
2
2
(iii) CH
– CH = CH – CH = C
H
3
(iv) CH
= CH – CH = C
– CH
2
3
(A) i only
(B) i and ii only
(C) ii and iii only
(D) iii and iv only
(E) i, ii, iii and iv

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