Question

Describe one reaction in which a more active non-metal displaces less active non-metal from their salts.

Answer 1

1. Displacement reactions: The reactions in which one atom (or group of atoms) is replaced by another atom (or group of atoms) are called displacement reactions.
2. Example- Zinc ($\mathrm{Zn}$) displaces hydrogen ($\mathrm{H}$) from Sulphuric acid (${\mathrm{H}}_2{\mathrm{SO}}_4$).

$$\begin{gathered} \mathrm{Zn}\left(\mathrm{s}\right)+{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\to {\mathrm{ZnSO}}_4\left(\mathrm{aq}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right) \\ \mathrm{Zinc}\mathrm{Sulphuric}\mathrm{Zinc}\mathrm{Hydrogen} \\ \mathrm{acid}\mathrm{sulphate} \end{gathered}$$

3. An example of a reaction in which a more active non-metal displaces less active non-metal from their salts is-

Chlorine (a non-metal) is more reactive than bromine (another non-metal) and thus, the chlorine ($\mathrm{Cl}$) atom replaces the bromine ($\mathrm{Br}$) atom from salt potassium bromide ($\mathrm{KBr}$).

$$\begin{gathered} 2\mathrm{KBr}\left(\mathrm{aq}\right)+{\mathrm{Cl}}_2\left(\mathrm{aq}\right)\to 2\mathrm{KCl}\left(\mathrm{aq}\right)+{\mathrm{Br}}_2\left(\mathrm{aq}\right) \\ \mathrm{Potassium}\mathrm{Chlorine}\mathrm{Potassium}\mathrm{Bromine} \\ \mathrm{bromide}\mathrm{Chloride} \end{gathered}$$