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Hybridisation in Carbon

The number of...

Question

The number of sigma and pi-bonds in but-1-ene-3-yne are:

σ

and 5

π

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σ

and 3

π

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σ

and 2

π

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σ

and 4

π

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Solution

The correct option is B 7 $σ$ and 3 $π$
Single bond contains only a sigma bond, one double bond contains a sigma and a $π$ bond, whereas a triple bond contains a sigma bond and 2 $π$ bonds.
So, $C H_{2} = C H - C \equiv C H$
Number of $σ$ bonds = 2 + 1 + 1 + 1 + 1 + 1 = 7
Number of $π$ bonds = 1 + 2 = 3

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