Question
Phosphine is prepared by the action of
A.
$$P\,\,{\text{and}}\,\,{H_2}S{O_4}$$
B.
$$P\,\,{\text{and}}\,\,NaOH$$
C.
$$P\,\,{\text{and}}\,\,{H_2}S$$
D.
$$P\,\,{\text{and}}\,\,HN{O_3}$$
Answer :
$$P\,\,{\text{and}}\,\,NaOH$$
Solution :
\[\underset{\begin{smallmatrix}
\text{White} \\
\text{phosphorus}
\end{smallmatrix}}{\mathop{{{P}_{4}}}}\,+\underset{\begin{smallmatrix}
\text{Caustic} \\
\text{soda}
\end{smallmatrix}}{\mathop{3NaOH}}\,+3{{H}_{2}}O\to \] $$\mathop {P{H_3}}\limits_{{\text{Phosphine}}} + \mathop {3Na{H_2}P{O_2}}\limits_{{\text{Sod}}{\text{. hypophosphite}}} $$