What happens when (i) lead (II) nitrate is heated? (ii) iron (II) sulphate is heated? (iii) silver chloride is exposed to sunlight? Write balanced…

(i) Brown fumes of nitrogen dioxide are formed. \[2 \mathrm{~Pb}\left(\mathrm{NO}_{3}\right)_{2}(\mathrm{~s}) \xrightarrow{\text { Heat }} 2 \mathrm{PbO}(\mathrm{~s})+4 \mathrm{NO}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \]

(ii) Smell of burning sulphur is observed/ Colour of crystal changes. \[2 \mathrm{FeSO}_{4}(\mathrm{~s}) \xrightarrow{\text { Heat }} \mathrm{Fe}_{2} \mathrm{O}_{3}(\mathrm{~s})+\mathrm{SO}_{2}(\mathrm{~g})+\mathrm{SO}_{3}(\mathrm{~g}) \]

(iii) White silver chloride turns grey. \[2 \mathrm{AgCl}(\mathrm{~s}) \xrightarrow{\text { Sunlight }} 2 \mathrm{Ag}(\mathrm{~s})+\mathrm{Cl}_{2}(\mathrm{~g}) \]