Phosphine is generally prepared in the laboratory - Vidyadip

MCQ

Phosphine is generally prepared in the laboratory

A
By heating phosphorus in a current of hydrogen
✓
By heating white phosphorus with aqueous solution of caustic potash
C
By decomposition of ${P_2}{H_4}$ at ${110\,^o}\,C$
D
By heating red phosphorus with an aqueous solution of caustic soda

✓

Answer

Correct option: B.

By heating white phosphorus with aqueous solution of caustic potash

b
(b) $\mathop {{P_4}}\limits_{{\rm{White}}} + 3NaOH + 3{H_2}O\, \to \,\mathop {P{H_3}}\limits_{{\rm{Phosphine}}} + 3Na{H_2}P{O_2}$

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