Choose the Best Answer · Q5
Q.The ratio of number of sigma (σ) and pi (π) bonds in 2-butynal is
(a) 8/3
(b) 5/3
(c) 8/2
(d) 9/2
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Start your 14-day free trial to unlock the full solution →Step 1. 2-Butynal is CH₃-C≡C-CHO (but-2-ynal): a methyl group, a carbon-carbon triple bond, and a terminal aldehyde (-CHO) group.
Step 2. Count σ bonds: 4 C-H bonds (3 from the CH₃ group, 1 from the CHO group) + 3 C-C-type σ bonds (CH₃-C, the σ component of C≡C, and C-CHO) + 1 C-O σ bond (the σ component of the aldehyde C=O) = 4 + 3 + 1 = 8 σ bonds. …
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