P-Block Elements Ques 565

Question: P2H4 can be removed from phosphme containing traces of it

Options:

A) by passing impure PH3 gas through a freezing mixture.

B) by passing the impure PH3 gas through HI and then its treatment with KOH (aq).

C) by both [a] and [b]

D) by none of these.

Show Answer

Answer:

Correct Answer: C

Solution:

Both the methods [a] and [b] can be used. When passed through freezing mixture the P2H4 present condenses and pure PH3 is obtained. When passed through HI, PH3 is absorbed forming PH4I.PH4I when treated with KOH(aq) yields pure phosphine. PH3+HIPH4I PH4I+KOH(aq)KI+H2O+PH3



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