Q. 43.5( 2 Votes )

PCl5 acts as an o

Answer :


PCl5 can only act as an oxidizing agent.


The highest oxidation state of P is +5. In PCl5, phosphorus is in its highest oxidation state (+5). Hence, it can only decrease its oxidation state and act as an oxidizing agent rather than increase in oxidation state and act as a reducing agent.


PCl5 + H2 PCl3 + 2HCl


In above equation,


In PCl5, P has oxidation state = 5.


In H2, H has oxidation state = 0.


In PCl3, P has oxidation state = 3.


In HCl, H has oxidation state = +1.


Now, taking the other reaction,


2Ag + PCl5 2AgCl + PCl3.


In Ag, Ag has 0 oxidation state.


In PCL5, P has +5 oxidation state.


In AgCl, Ag has +1 oxidation state.


In PCl3, P has +3 oxidation state.


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