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Explain why NH_(3)is basic while BiH_3 is only feebly basic. |
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Answer» Solution :The basic nature of `NH_3` and `BiH_3` is because of presence of electron pair on nitrogen and bimusth respectively. HOWEVER, bismuth being very LARGE is size, the electron pair gets diffused over LARGER region as a result, the electron DENSITY on bismuth decreases which makes `BiH_3` a feebly basic. Nitrogen atom is small in size has high electron density as electron pair is concentrated on a SMALLER region. This makes ammonia a strong base. |
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