Question

(a) Powdered sodium chloride (common salt) does not conduct an electric current, but it does so when ………....... or when ………........

(b) Molten lead bromide conducts electricity .It is called an ………........ It is composed of lead ……….......and bromide ………........ The lead ions are ………....... charged and are called ………........ The bromide ……….......are ……….......charged and are called ………........

(c) Substances which conduct electricity in the solid state are generally ………........

(d) The electron releasing tendency of zinc is ………....... than that of copper.

(e) A solution of HCl gas in water conducts electricity because ………......., but a solution of HCl gas in toluene does not conduct an electric current because ……….......

Answer 1

(a) Powdered sodium chloride (common salt) does not conduct an electric current, but it does so when dissolved in water or when melted.

(b) Molten lead bromide conducts electricity .It is called an electrolyte. It is composed of lead ions and bromide ions. The lead ions are positively charged and are called cations. The bromide ions are negatively charged and are called anions.

(c) Substances which conduct electricity in the solid state are generally metals.

(d) The electron releasing tendency of zinc is more than that of copper.

(e) A solution of HCl gas in water conducts electricity because it ionizes, but a solution of HCl gas in toluene does not conduct an electric current because it does not ionize in toluene.