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NH_(3) has a higher proton affinity than PH_(3). Explain. Or NH_(3) is more basic than PH_(3). |
Answer» Solution :Due the presence of a lone pair of ELECTRONS on N and P, both `NH_(3) and PH_(3)` act as Lewis bases and accept a proton to form an additional N-H and P-H bonds respectively  However, due to smaller size of N over P, N-H bond thus formed is MUCH stronger than the P-H bond. Therefore, `NH_(3)` has HIGHER proton AFFINITY than `PH_(3)`. In other words, `NH_(3)` is more basic than `PH_(3)`. |
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