$\mathrm{PCl}_5$ reacts with finely divided silver on heating and a white silver salt is obtained, which dissolves on adding excess aqueous $\mathrm{NH}_3$ solution. Write the reactions involved to explain what happens.
$\mathrm{PCl}_5$ on reaction with finely divided silver produced silver halide.
$$\mathrm{PCl}_5+2 \mathrm{Ag} \longrightarrow 2 \mathrm{AgCl}+\mathrm{PCl}_3$$
AgCl on further reaction with aqueous ammonia solution produces a soluble complex of $\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]^{+} \mathrm{Cl}^{-}$
$\mathrm{AgCl}+2 \mathrm{NH}_3(a q) \longrightarrow \underset{\text { Soluble complex }}{\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]^{+}} \mathrm{Cl^-}$
Phosphorus forms a number of oxoacids. Out of these oxoacids, phosphinic acid has strong reducing property. Write its structure and also write a reaction showing its reducing behaviour.
Among various forms of oxoacids, phosphinic acid has stronger reducing property.
Reaction showing reducing behaviour of phosphinic acid is as follows
$$4 \mathrm{AgNO}_3+2 \mathrm{H}_2 \mathrm{O}+\mathrm{H}_3 \mathrm{PO}_2 \longrightarrow 4 \mathrm{Ag} \downarrow+4 \mathrm{HNO}_3+\mathrm{H}_3 \mathrm{PO}_4$$
Match the compounds given in Column I with the hybridisation and shape given in Column II and mark the correct option.
| Column I | Column II | ||
|---|---|---|---|
| A. | $\mathrm{XeF_6}$ | 1. | $sp^3d^3$-distorted octahedral |
| B. | $\mathrm{XeO_3}$ | 2. | $sp^3d^2$-square planar |
| C. | $\mathrm{XeOF_4}$ | 3. | $sp^3$-pyramidal |
| D. | $\mathrm{XeF_4}$ | 4. | $sp^3d^2$-square pyramidal |
Match the formulas of oxides given in Column I with the type of oxide given in Column II and mark the correct option.
| Column I | Column II | ||
|---|---|---|---|
| A. | $\mathrm{Pb_3O_4}$ | 1. | Neutral oxide |
| B. | $\mathrm{N_2O}$ | 2. | Acidic oxide |
| C. | $\mathrm{Mn_2O_7}$ | 3. | Basic oxide |
| D. | $\mathrm{Bi_2O_3}$ | 4. | Mixed oxide |
Match the items of Columns I and II and mark the correct option.
| Column I | Column II | ||
|---|---|---|---|
| A. | $\mathrm{H_2SO_4}$ | 1. | Highest electron gain enthalpy |
| B. | $\mathrm{CCl_3NO_2O}$ | 2. | Chalcogen |
| C. | $\mathrm{Cl_2}$ | 3. | Tear gas |
| D. | Sulphur | 4. | Storage batteries |