
Interpretation:
The reason for the geometric structure of ammonia to not be described as tetrahedral needs to be explained.
Concept introduction:
Structure of molecule can be drawn using VSEPR theory. The total number of bonding and non-bonding pairs of electrons tells about the geometry of the molecule.
The valence electrons are the electrons present in outermost shell.

Answer to Problem 45A
Geometric structure is tetrahedral. But due to presence of lone pair of electrons its structure gets distorted and its shape is pyramidal according to VSEPR theory.
Explanation of Solution
Lewis structure of
Structure shows in
A normal tetrahedral bond has bond angle of
Thus, ammonia has pyramidal shape due to presence of lone pair.
Chapter 12 Solutions
World of Chemistry
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