Chemistry - Complete P-block Question with Solution | TestHub

U is the anhydride of nitric acid and is obtained as highly reactive deliquescent, light sensitive, colorless, crystalline solid by carefully dehydrating the concentrated acid with ${\mathrm{P}}_4{\mathrm{O}}_{10}$ at low temperature. Reaction (1) : $4{\mathrm{HNO}}_3+{\mathrm{P}}_4{\mathrm{O}}_{10}\stackrel{-10^{\circ }\mathrm{C}}{\to }2\mathrm{U}+4{\mathrm{HPO}}_3$ U is readily hydrated to nitric acid and reacts with ${\mathrm{H}}_2{\mathrm{O}}_2$ to give pernitric acid as a product. Reaction (2) : $\mathrm{U}+{\mathrm{H}}_2\mathrm{O}\to 2{\mathrm{HNO}}_3$ Reaction (3) : $\mathrm{U}+{\mathrm{H}}_2{\mathrm{O}}_2\to {\mathrm{HNO}}_3+{\mathrm{HNO}}_4$ U reacts violently as an oxidizing agent towards many metals, non metals and organic substances Reaction (4) : $\mathrm{U}+\mathrm{Na}\to \mathbf{X}+{\mathrm{NO}}_2$ Reaction (5) : $\mathrm{U}+\mathrm{NaF}\to \mathbf{X}+{\mathrm{FNO}}_2$ Reaction (6) : $\mathrm{U}+{\mathrm{I}}_2\to {\mathrm{I}}_2{\mathrm{O}}_5+{\mathrm{N}}_2$