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  4. The ratio of number of σ and π-bonds in 1-buten-3-yne is

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Q. The ratio of number of $\sigma$ and $\pi$-bonds in $1$-buten-$3$-yne is

UP CPMTUP CPMT 2013Organic Chemistry – Some Basic Principles and Techniques

Solution:

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no. of $\sigma$ bonds $= 7$
no. of $\pi$ bonds $= 3$
ratio of $\sigma$ to $\pi$ bond $=\frac{7}{3}$