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Sigma Bond and Pi Bond

The number of...

Question

The number of sigma and pi bonds in the structure:
$C H_{2} = C H - C \equiv C H$

7 and 3

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6 and 2

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4 and 3

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All are sigma bonds

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Solution

The correct option is D 7 and 3
In $H_{2} C = C H - C \equiv C H$ , there are $4 C - H$ sigma bonds and $3 C - C$ sigma bonds, thus it has a total of $7 σ$ bonds. Also there are $3 π$ bonds in the structure.

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