Chapter 5.4, Problem 2QQ

Interpretation Introduction

Interpretation:

The number of vacancies present in the valence shell of carbon atom has to be chosen from the given options.

Concept Introduction:

All the elements present in the periodic table cannot form multiple covalent bonds.  Atleast two vacancies has to be present in the valence shell of atom prior to bond formation for forming a double covalent bond and three vacancies has to be present in the valence shell of atom prior to bond formation for forming triple covalent bond.  Elements present in Group VIIA and hydrogen cannot form multiple covalent bonds as there is only one vacancy.