Answer:
A. NO2 gas released, [tex]NO_{3}^{-}[/tex] ion is present.
The residue is (ZnO) Zn oxide, [tex]Zn^{2+}[/tex] ion is present.
The white salt is Zn(NO3)2.
B. CO2 gas released, [tex]CO_{3}^{2-}[/tex] ion present.
The residue ia (CuO ) Cu(||) oxide, [tex]Cu^{2+}[/tex] ion present .
The green salt is CuCO3.
C. CO2 gas released, [tex]CO_{3}^{2-}[/tex] ion present.
The residue Pb(||) oxide, [tex]Pb^{2+}[/tex] ion is present.
The white salt is PbCO3.
D. CO2 gas released, [tex]CO_{3}^{2-}[/tex] ion present.
The residue is (ZnO) Zn oxide, [tex]Zn^{2+}[/tex] ion is present.
The white salt is ZnCO3.
