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Number of $\sigma$ and $\pi$ bonds in $\mathrm{C}_2 \mathrm{H}_2$ is respectively
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The correct answer is:
3,2
Key Idea Single bond $=1 \sigma$,
Double bond $=1 \sigma+1 \pi$, Triple bond $=1 \sigma+2 \pi$ The structure of $\mathrm{C}_2 \mathrm{H}_2$ is
$\therefore$ Number of $\sigma$ bonds $=3$
Number of $\pi$ bonds $=2$
Double bond $=1 \sigma+1 \pi$, Triple bond $=1 \sigma+2 \pi$ The structure of $\mathrm{C}_2 \mathrm{H}_2$ is
$\therefore$ Number of $\sigma$ bonds $=3$
Number of $\pi$ bonds $=2$
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