The number of sigma and pi-bonds in 1-butene -3-yne are

Question

(a) 5 sigma and 5 pi

(b) 7 sigma and 3 pi

(c) 8 sigma and 2 pi

(d) 5 sigma and 4 pi

Answer 1

In $ (H_2 = CH - C \equiv CH)$ there are $7 \sigma$ and $3 \pi$ bonds.

Hence b is the correct answer.