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  4. Which is a Lewis base?

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Q. Which is a Lewis base?

NTA AbhyasNTA Abhyas 2020Equilibrium

Solution:

According to Lewis, "A base is a species which can donate an electron pair." In $NH_{3},\overset{\cdot \cdot }{N}$ has one lone pair. Thus, $\overset{\cdot \cdot }{N}H_{3}$ is a Lewis base.