Question

Draw the Lewis structure for HCN. Indicate the hybrid orbitals, and draw a picture showing all the bonds between the atoms labelling each bond as $\sigma$or $\mathrm{\pi }$.

Short answer

Lewis structure of HCN

HCN contains two $\sigma$ bonds and two $\mathrm{\pi }$bonds

Step-by-step solution

About HCN

HCN is a linear molecule that contains one triple bond between a carbon atom and a nitrogen atom, a single bond between a carbon atom and a hydrogen atom. The nitrogen atom contains one free electron pair.

The single bond between hydrogen and carbon represents $\sigma$as well as one bond between nitrogen and carbon. There are also two $\mathrm{\pi }$bonds outside the line between two nuclei in between carbon and nitrogen.

Lewis structure 

The Lewis structure for HCN is