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How many σ and π bonds are present in each of the following molecules?

(a) HC≡CCH=CHCH3 (b) CH2=C=CHCH3

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(a) σC – C: 4; σC–H : 6; πC=C :1; π C≡C:2

(b) σC – C: 3; σC–H: 6; πC=C: 2

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