Match the following:

Column – I	Column - II
1) Aqueous mineral acids	p) ${\text{CuSO}}_4\left(\text{sol}\right),\text{NaC}l\left(\text{aq}\right),\text{KBr}\left(\text{fused}\right)$
2) Aqueous caustic alkali	q) KOH (aq), NaOH (aq)
3) Ionic salts of strong acids	r) ${\text{H}}_{\text{2}}{\text{CO}}_{\text{3}}\left(\text{aq}\right),{\text{CH}}_{\text{3}}\text{COOH}\left(\text{aq}\right)$
4) Aqueous solution of acids	s) ${\text{HNO}}_3,{\text{H}}_{\text{2}}{\text{SO}}_4,\text{HC}l$