State one relevant observation
Dil. `H_2SO_4` is added to zinc sulphide.

State one relevant observation for each of the following reactions : Dil. H_2SO_4 is added to zinc sulphide.

State one relevant observation Water is added to anhydrous copper sulphate.

Give your observation : Dilute nitric acid is added to iron sulphide.

State one relevant observation for the reaction Sulphide ore is added to a tank containing oil and water, and then stirred or agitated with air.

State one relevant observation for the following: When hydrogen sulphide gas is passed through lead acetate solution.

State one relevant observation for the following: Platinum is added to aqua-regia.

State two relevant observation Ammonium hydroxide solution is added to zinc nitrate solution in minimum quantities and then in excess.

State one relevant observation - Barium chloride solution is slowly added to sodium sulphate solution.

State the observation seen when conc . H_(2)SO_(4) is added to i] ]sucrose (ii) hydrated copper [II] sulphate.

State one observation: A zinc granule is added to copper sulphate solution.