Question

4. Identify the type of chemical reaction taking place in each of the following-
() chloride solution is mixed with copper sulphate solution and a white precipitate is formed.
(ii) On heating copper powder in air in a china dish, the surface of the copper powder turns black.
(on heating green coloured sulphate crystals, reddish brown solid is left and smell of gas
having dour of burning sulphur is experienced.
(iv)White silver chloride turns grey in sunlight.
(V)Barium hydroxide reacts with ammonium chloride solution to give ammonia, barium chloride
and water.
(vi)lron nails when left dipped in blue copper sulphate solution become brownish in colour and
the blue colour of copper sulphate fades away.
(vii)Quick lime reacts vigorously producing a hissing sound with water releasing a large amount
of heat.​

Answer 1

Answer:

1)Precipitation reaction

6)Displacement reaction

7)Exothermic reaction