A) White phosphorus and dil. \[NaOH\]
B) White phosphorus and conc. \[NaOH\]
C) Red phosphorus and dil. \[NaOH\]
D) Red phosphorus and conc. \[NaOH\]
Correct Answer: B
Solution :
\[{{P}_{4}}+3NaOH+3{{H}_{2}}O\,\to \,P{{H}_{3}}+Na{{H}_{2}}P{{O}_{4}}\]
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