Pick out the incorrect statement.

Options

A. `PH_(4)^(+)` ion is tetrahedral like the `NH_(4)^(+)` ionn and is obtained when `PH_(3)` is bonded to proton
B. `PH_(4)l` is one of the most stable salts containing the phosphonium ion. It is also more stable than ammonium salts
C. `PH_(4)l` is decomposed by water to form `PH_(3)`
D. `PH_(3)` converts silver salts in solution to silver phosphide, which subsequetly reacts to give free metal

Answer

B

Explanation

Phosphonium iodide is less thermally stable than ammonium salts, because phospine is less basic than ammonia and decomposition occurs at `60^(@)`
(a) `PH_(3)+Hl to PH_(4)^(+)l^(-)`
(b) `PH_(4)l+H_(2)O to PH_(3)+H_(3)O^(+)+l^(-)`
(c) `6Ag^(+)+PH_(3)+3H_(2)Oto6Ag+H_(3)PO_(3)+6H^(+)`