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Question
Give two equations to illustrate the chemical behaviour of phosphine.
Solution
1. Phosphine reacts with halogens to give phosphorous Penta halides.
\[\ce{PH3 + 4Cl2 -> PCl5 + 3HCl}\]
2. Phosphine forms a coordination compound with lewis acids such as boron trichloride.
\[\ce{BCl3 + PH3 -> \underset{\text{(Coordination compound)}}{[Cl3B<- :PH3]}}\]
3. Phosphine precipitates some metal from their salt solutions.
\[\ce{3AgNO3 + PH3 -> Ag3P + 3HNO3}\]
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