The number of sigma and pi-bonds in 1-butene-3-yne are:
A
6 sigma and 4 pi
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B
7 sigma and 3 pi
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C
5 sigma and 5 pi
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D
none of these
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Solution
The correct option is D 7 sigma and 3 pi The number of sigma and pi-bonds in 1−butene−3−yne are 7 and 3 respectively. Hence, the option (B) is correct answer.