Question

17.Identify the type of chemical reaction taking place in each of the following
with chemical equation:
(a)Barium chloride solution is mixed with copper sulphate solution and a
Whiteprecipitate is observed.
(b) On heating copper powder in air in a China dish, the surface of copper
powder turnsblack.
(c) On heating green coloured ferrous sulphate crystals, reddish brown solid
is left andsmell of a gas having odour of burning sulphur is experienced.
(d) Iron nails when left dipped in blue copper sulphate solution become
brownish incolour and the blue colour of copper sulphate fades away.
(e) Quick lime reacts vigorously with water releasing a large amount of
heat.​

Answer 1

1. Double displacement and precipitation reaction

2. Combination reaction

3. Thermal reaction

4. Displacement reaction

5. Combination and exothermic reaction