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Solution


Q.

The number of sigma (σ) and pi (π) bonds in pent-2-en-4-yne is            [2019]
1 13 σ bonds and no π bond  
2 10 σ bonds and 3 π bonds  
3 8 σ bonds and 5 π bonds  
4 11 σ bonds and 2 π bonds.  

Ans.

(2)

Correct name will be pent-3-en-1-yne