When a mixture containing phosphate is heated with conc. ${\mathrm{HNO}}_3$ and ammonium molybdate solution, a canary yellow precipitate is formed. The formula of the yellow precipitate is:

:

Shape of anion A will be:

Consider following reaction

Nitrite $+$ Acetic acid $+$ Thiourea $⟶{\mathrm{N}}_2\uparrow +{\mathrm{SCN}}^{-}+2{\mathrm{H}}_2\mathrm{O}$

The formation of the product in the above reaction can be identified by

The gas$\text{'}\mathrm{G}\text{'}$ will show which of the following property?

In the following diagram bunsen flame the $\left(\mathrm{X}\right)$ represents.

Then A may have: