Identify the type of chemical reaction taking place (i) on mixing a solution of potassium chloride with silver nitrate, an insoluble white substance is formed. (ii) on heating green coloured ferrous sulphate crystals, reddish-brown solid is left and smell of a gas having odour of burning sulphur is observed.

Identify the type of chemical reaction taking place (i) on mixing a s

1.	Identify the type of chemical reaction taking place (i) on mixing a solution of potassium chloride with silver nitrate, an insoluble white substance is formed. (ii) on heating green coloured ferrous sulphate crystals, reddish-brown solid is left and smell of a gas having odour of burning sulphur is observed.
Answer» Solution :(i) `underset("chloride")underset("Potassium")(KCl(aq))+underset("nitrate")underset("Silver")(AgNO_(3)(aq))rarrunderset(("White precipitate"))underset("Silver chloride")(AGCL(s))+underset("nitrate")underset("Potassium")(KNO_(3)(aq)` This reaction is an example of double displacement and precipitation reaction in which a precipitate of silver chloride is obtained. (ii) `underset(("Green"))underset("Ferrous sulphate")(2FeSO_(4)(s))overset("Heat")rarrunderset(("Reddish-brown"))underset("Ferric OXIDE")(Fe_(2)O_(3)(s))+SO_(2)(g)+SO_(3)(g)` This reaction is an example of decomposition (thermal decomposition) reaction because a single SUBSTANCE `(FeSO_(4))` breaks down into THREE substances `(Fe_(2)O_(3),SO_(2)andSO_(3))`. Here, `SO_(2)` gives the smell of burning sulphur.