Chapter 11, Problem 14STP

Interpretation Introduction

Interpretation:

The molecular shape should be selected for a given molecule that have four shared pair of electrons and no lone pairs of electrons from the given shapes.

Concept introduction:

The geometric shape of the molecule is predicted by VSEPR theory (Valence shell electron pair repulsion theory) from electron pairs surrounding the central atom of the molecule whereas the molecular shape of the molecule is predicted by number of electron pairs as well as lone pairs.

Answer to Problem 14STP

The correct option is (C):

Explanation of Solution

Given:

Reason for correct option:

The molecular shape can be determined for a molecule that have four shared pair of electrons and no lone pairs of electrons by taking the example of alkane.

• The structure of alkanes has single bond between carbon and hydrogen atoms. So, in alkane there is 4 bonded atoms and no lone pair across the carbon atom and thus, according to VESPR the shape of the molecule will be tetrahedral.

Hence, the correct option is (C):

Conclusion

Reason for correct options:

The geometry A and E have 2 and 1 lone pair respectively whereas geometry B and D both possess less than 4 number of electron pairs.