1.

Find the incorrect statement

Answer»

`PH_4^+` ion is tetrahedral like `NH_4^+` ion and is OBTAINED when `PH_3` is bonded to proton
`PH_4I` is one of the most stable salt containing the phosphonium ion. It it also more stable than ammonium salts
`PH_4I` is decomposed caustic potash to FORM `PH_3`
`PH_3` is USED for making Holme's signals

ANSWER :B


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