Test Q: A compound `'X'` was fused with `Na` metal and the extract gave a white precipitate with `AgNO_(3)`. The Lassaigne's extract gave a red colouration with neturl `FeCl_(3)`. Test -R while compound `'Y'` when fused with `Na` methal and subsequent analysis on its Lasaigne's extract did not give any characteristic test. Test -S while compund `Y` on fusion with fusion mixture (sodium carbonate `+` potassium nitrate) `Na_(2)O_(2),` followed by extraction, followed by addition of conc. `HNO_(3)` and ammonium molybdate give a yelow precipitate.
The chemical reaction taking place in `Y`, when it is fused with fusion mixture ils

Options

A. `3Na+P+4OtoNa_(3)PO_(4)`
B. `3Na_(2)CO_(3)+2P+[O]to2Na_(3)PO_(4)+3CO_(2)`
C. `3KNO_(3)+P+3OtoK_(3)PO_(4)+3NO_(2)+O_(2)`
D. none of these

Answer

B

Explanation

NA