Chemical Bonding And Molecular Structure Ques 129

The outer orbitals of $C$ in ethene molecule can be considered to be hybridized to give three equivalent $s p^{2}$ orbitals. The total number of sigma $(\sigma)$ and pi $(\pi)$ bonds in ethene molecule is 5

[NEET Kar. 2013]

(a) 1 sigma $(\sigma)$ and 1 pi $(\pi)$ bond

(b) 3 sigma $(\sigma)$ and $1 pi(\pi)$ bonds

(c) 4 sigma $(\sigma)$ and $1 \pi$ bonds

(d) 5 sigma $(\sigma)$ and $1 \pi$ bonds

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Solution:

$ \text{ (d) } \begin{matrix} H-\frac{\sigma}{C} \stackrel{\sigma}{\bar{\pi}} C \stackrel{\sigma}{\sigma} H \\ \sigma \mid & \mid \sigma \ H and H \end{matrix} $