Q. White phosphorus reacts with caustic soda, the products are ${PH}_{3}\ and\ {NaH}_{2}{PO}_{2}.$ This reaction is an example of
A) Oxidation
B) Reduction
C) Disproportionation
D) Neutralisation
Explanation
(c)
$\because$ In this reaction phosphorus is simultaneously oxidised and reduced.
$\therefore\ \ \$It is disproportionation reation.
_{0 + -3}
$P_{4} + 3NaOH + 3H_{2}O \longrightarrow 3{NaH}_{2}{PO}_{2} + {PH}_{3}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.