From the formulae listed in the box, choose one in each case corresponding to the salt having the given description:
`AgCl,CuCO_(3),CuSO_(4)*5H_(2)O,KNO_(3),NaCl,NaHSO_(4),Pb(NO_(3))_(2) ,
(i) an acid salt
(ii) an insoluble chloride
(iii) on treating with concentrated sulphuric acid, this salt changes from blue to white.
(iv) on heating, this salt changes from green to black.
(v) this salt gives nitrogen dioxide on heating.

Explanation

`CuCO_3`