A) \[P{{H}_{3}}+Na{{H}_{2}}P{{O}_{2}}\]
B) \[P{{H}_{3}}+N{{a}_{2}}P{{O}_{4}}\]
C) \[P{{H}_{3}}+N{{a}_{2}}HP{{O}_{2}}\]
D) \[{{H}_{3}}P{{O}_{4}}+NaO\]
Correct Answer: A
Solution :
White phosphorus, when heated with caustic alkali solution in an inert atmosphere phosphine is liberated \[\underset{\begin{smallmatrix} \,\,\,\,\,\,\,\,\,white \\ phosphorus \end{smallmatrix}}{\mathop{{{P}_{4}}}}\,+\underset{\begin{smallmatrix} \,\,\,sodium \\ hydroxide \end{smallmatrix}}{\mathop{3NaOH}}\,+3{{H}_{2}}O\xrightarrow{\Delta /inert\,\,atmosphere}\]\[\underset{phosphine}{\mathop{P{{H}_{3}}}}\,+\underset{\begin{smallmatrix} Pot. \\ hyposphosphite \end{smallmatrix}}{\mathop{3Na{{H}_{2}}P{{O}_{2}}}}\,\]
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