Q. The sodium extract of an organic compound on boiling with $HNO_{3}$ and addition of ammonium molybdate of solution gives a yellow precipitate. The compound contains

A) Nitrogen
B) Phosphorus
C) Sulphur
D) Chlorine
Explanation

(b)
$Na_{3}PO_{4} + 3HNO_{3} \rightarrow H_{3}PO_{4} + 3NaNO_{3}$
sod. extract
$H_{3}PO_{4} + 12\left( NH_{4} \right)_{2}MoO_{4} + 21HNO_{3} \rightarrow \left( NH_{4} \right)_{3}PO_{4}.12MoO_{3} + 21NH_{4}NO_{3} + 12H_{2}O$
yellow ppt.

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.