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Question

The maximum covalency of nitrogen is

A
3
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B
4
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C
5
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D
6
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Solution

The correct option is C 4
Nitrogen has two 2s and three 2p valence electrons. By sharing the three 2p electrons, nitrogen can form three covalent bonds. For example, NH3. But still the nitrogen atom has a lone pair of electrons from 2s orbital. By donating these two electrons from lone pair, it can form one bond. For example, NH4+.
Thus, nitrogen can form four bonds

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