1.

P_(4)O_(10) is not used to dry NH_(3) gas because

Answer»

`P_(4)O_(10)` is not a drying agent
`P_(4)O_(10)` reacts with moisture in `NH_(3)`
`P_(4)O_(10)` is basic and `NH_(3)` is acidic
none of these

Solution :`P_(4)O_(10)` being acidic & `NH_(3)` is basic, so they react with each other in presence of moisture giving ammonium phosphate. Hence `P_(4)O_(10)` can't be used for drying of `NH_(3)`
`P_(4)O_(10) + 12NH_(3) + 6H_(2)O rarr 4(NH_(4))_(3) PO_(4)`


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