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NEET UG CHEMISTRY MCQ: ORGANIC CHEMISTRY-SOME BASIC PRINCIPLES AND TECHNIQUES

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The number of σ−  and  π - \sigma - \,\,{\text{and}}\,\,\pi {\text{ - }} bonds in but-1-ene- 3-yne are:
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Correct option: B
7σ  and  3π7\sigma \,\,{\text{and}}\,\,3\pi
Option A (Allyl carbonium ion (CH2=CH−C+H2)(C{H_2} = CH - \mathop {\mathrm{ }C}\limits^ + {H_2}) is more stable then propyl carbonium ion) is correct because the allyl carbocation is stabilized by resonance, while the propyl carbocation is not.

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