Chapter 9, Problem 15STP

Interpretation Introduction

Interpretation:

The number of valance electron takes part in the formation of covalent bonds in chloroform molecule needs to be determined.

Concept introduction:

Covalent bonds are formed by the equal sharing of electrons from both the atoms involved. The pair of electrons involved in this form of bonding is called shared pair or bonding pair.

Answer to Problem 15STP

Option C is correct.

Explanation of Solution

Total number of valence electrons in chloroform is 26. Some of them can participate in the formation of covalent bond. The electron dot structure of chloroform is as follows:

Carbon atom forms four covalent bonds, one with a hydrogen atom and three with other chlorine atoms. Each bond share two electrons therefore, four bonds share a total of eight electrons.

Conclusion

Option A, B, D and are incorrect as chloroform have total of 26 electrons and chloroform forms four covalent bonds that means they required a total of 8 valence electrons.