Each Part: 1 Mark
a) Sodium nitrate, NaNO3. It does not give NO2 on heating.
2NaNO3Δ→ 2NaNO2+O2↑
(b) Ammonium nitrate, NH4NO3 on heating does not give any residue.
NH4NO3Δ→2H2O↑+N2O↑
(c) Copper nitrate, Cu(NO3)2 on heating gives CuO and NO2.
2(CuNO3)2Δ→ 2CuO+4NO2+O2
(d) Silver nitrate, AgNO3 on heating gives Ag, NO2 and O2.
2AgNO3Δ→ 2Ag+2NO2+O2↑
(e) Iron(III) sulphate (FeSO4) absorbs NO.
FeSO4+NO→FeSO4.NO