• # question_answer Number of  $\sigma$ and $\pi$bonds present in 1- butene-3-yne respectively are [RPMT 1999; MP PET 2000; DCE 2000] A) $7\sigma ,\,3\pi$ B) $5\sigma ,\,2\pi$ C) $8\sigma ,3\pi$ D) $6\sigma ,2\pi$

Correct Answer: A

Solution :

$\underset{7\sigma ,\,3\pi }{\mathop{C{{H}_{2}}=CH-C\equiv CH}}\,$

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