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On being slowly passed through water, PH...

On being slowly passed through water, `PH_(3)` forms bubbles but `NH_(3)` dissolves. Why is it so ?

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`N-H` bond is more polar than `P-H` bond. Hence, `NH_(3)` forms hydrogen bonds with `H_(2)O` molecules and hence dissolves in it whereas `PH_(3)` does not dissolve and forms bubbles
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