Which of the following species contains three bond pairs and one lone pair around the central atom?
A
NH−2
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B
PCl3
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C
H2O
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D
BF3
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Solution
The correct option is BPCl3 Representation of Lewis structure:
1. Pair of bonded electrons is represented by means of a dash usually called a bond.
2. Lone pairs or non-bonded electrons are represented by dots.
3. Electron represent in the last shell of atoms are called valence electrons.
(a) Structure of NH−2
Number of bond pairs: 2
Number of lone pairs: 2 (b) Structure of PCl3Number of bond pairs: 3
Number of lone pair: 1