Give two equations to illustrate the chemical behaviour of phosphine.

Give a reaction between nitric acid and a basic oxide.

Suggest a reason why HF is a weak acid, whereas binary acids of the all other halogens are strong acids.

Deduce the oxidation number of oxygen in hypofluorous acid – HOF.

Complete the following reactions.
\(1. \mathrm{NaCl}+\mathrm{MnO}_{2}+\mathrm{4H}_{2} \mathrm{SO}_{4} \longrightarrow \)
\(2. \mathrm{NaNO}_{2}+\mathrm{HCl} \longrightarrow \)
\(3.\mathrm{P}_{4}+\mathrm{3NaOH}+\mathrm{3H}_{2} \mathrm{O} \longrightarrow \)
\(4. \mathrm{AgNO}_{3}+\mathrm{PH}_{3} \longrightarrow \)
\(5. \mathrm{Mg}+\mathrm{10HNO}_{3} \longrightarrow \)
\(6. \mathrm{KClO}_{3} \stackrel{\Delta}{\longrightarrow} \)
\(7. \mathrm{Cu}+Con. \ Hot \ \mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow\)
\(8. \mathrm{Sb}+\mathrm{Cl}_2 \longrightarrow \)
\(9. \mathrm{HBr}+\mathrm{H}_2 \mathrm{SO}_4 \longrightarrow \)
\(10. \mathrm{XeF}_6+\mathrm{H}_2 \mathrm{O} \longrightarrow \)
\(11. \mathrm{XeO}_6{ }^{4-}+\mathrm{Mn}^{2+}+\mathrm{H}^{+} \longrightarrow \)
\(12. \mathrm{XeOF}_4+\mathrm{SiO}_2 \longrightarrow \)
\(13. \mathrm{Xe}+\mathrm{F}_2 \frac{\mathrm{Ni} / 200 \mathrm{~atm}}{400^{\circ} \mathrm{C}}\).