From the list of the substances given, name the substances which you would use to prepare each of the following salts:
List of substances: copper, lead, sodium, zinc, copper oxide, lead carbonate, sodium carbonate solution, dilute hydrochloric acid, dilute nitric acid and dilute sulphuric acid.
Salts: (a) zinc sulphate (b) copper sulphate (c) sodium sulphate (d) lead sulphate.

(a) Zinc sulphate is prepared by displacement reaction between zinc and dilute sulphuric acid.

$\mathrm{Zn}+\mathrm{dil}.{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{ZnSO}}_4+{\mathrm{H}}_2$

(b) Copper sulphate is prepared by the neutralisation reaction of copper oxide with dilute sulphuric acid.

$\mathrm{CuO}+\mathrm{dil}.{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{CuSO}}_4+{\mathrm{H}}_2\mathrm{O}$

(c) Sodium sulphate is prepared by the neutralisation of soluble base i.e. sodium carbonate with dilute sulphuric acid.

${\mathrm{Na}}_2{\mathrm{CO}}_3+\mathrm{dil}.{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{Na}}_2{\mathrm{SO}}_4+{\mathrm{H}}_2\mathrm{O}+{\mathrm{CO}}_2$

(d) Lead sulphate: Preparation of lead sulphate from lead carbonate involves the following steps:

Step 1: Insoluble lead carbonate first reacts with dilute nitric acid to form soluble lead nitrate.

${\mathrm{PbCO}}_3+2{\mathrm{HNO}}_3\to \mathrm{Pb}({\mathrm{NO}}_3{)}_2+{\mathrm{H}}_2\mathrm{O}+{\mathrm{CO}}_2$

Step 2: Dilute sulphuric acid is added to lead nitrate to form lead sulphate and nitric acid.

$\mathrm{Pb}({\mathrm{NO}}_3{)}_2+\mathrm{dil}.{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{PbSO}}_4+2{\mathrm{HNO}}_3$