Question

What is//are not true abut phosphine `(PH_(3))`?
A. It turns red litmus blue.
B. It reacts with `HCl(aq)`.to give `PH_(4)Cl`.
C. Phosphonium compounds are obtained when anhydrous phosphine reacts with anhydrous halogen acids.
D. It is prepared by hydrolysis of metal phosphides with acids.

Answer 1

Correct Answer - A,B
(A) `PH_(3)` is a lewis base but is neutral towards red litmus.
(B) It does not react with HCI(aq)or HI(aq). This is because water decomposes `PH_(4)`X formed to give back `PH_(3)`.
(C ) It reacts only with anhydrous HCI or HBr.
(D) `2Na_(3)P+3H_(2)SO_(4)to 3Na_(2)SO_(4)+2PH_(3)uarr, Ca_(3)P_(2)+6HCIto 3CaCI_(2)+2PH_(3)`.