Question
$PH_3$ forms bubbles when passed slowly in water but $NH_3$ dissolves. Explain why?
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Answer
$PH_3$ forms bubbles means that it's not soluble in water and $NH_3$ completely dissolves because it's soluble in water. Now $NH_3$ can form hydrogen bonds with water i.e. $H_20$ and hence it's completely soluble in water while $PH_3$ can't form hydrogen bonds with water because of large size of phosphorus as compared to Nitrogen.
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