question_answer

  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:

     This reaction is an example of double displacement and precipitation reaction in which a precipitate of silver chloride is obtained. (ii) This reaction is an example of decomposition (thermal decomposition) reaction because a single substance (FeSO4) breaks down into three substances (Fe2O3, SO3 and SO3). Here, SO2 gives the smell of burning sulphur.