(i) Compound ‘A’ when dissolved in water gives compound ‘B’ which is used in whitewashing. Compound ‘B’ reacts with CO2 to form a white precipitate of compound ‘C’. Identify compounds ‘A’, ‘B’ and ‘C’. Also write the equations involved.
(ii) Which among the following are physical or chemical changes?
(a) Evaporation of petrol
(b) Burning of Liquefied Petroleum Gas (LPG)
(c) Heating of an iron rod to red hot
(d) Curdling of milk
(e) Sublimation of solid ammonium chloride
