State one relevant observation for the following:
When the gaseous product obtained by dehydration of ethyl alcohol is passed through bromine water.

State one appropriate observation for the following: When the gaseous product obtained by dehydration of ethyl alcohol is passed through bromine water.

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

State one relevant observation for the following reaction : Burning of ammonia in air.

State one relevant observation for the following: When ammonia gas is burnt in an atmosphere of excess oxygen.

State one appropriate observation for the following: When a piece of aluminium is anodised.

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

State one relevant observation for the following: Nitric oxide comes in contact with atmosphere.

State one relevant observation for the following: Anhydrous calcium chloride is exposed to air for some time

State relevant observations for the following: Magnesium strip is dropped in dilute hydrochloric acid.

State one relevant observation for the following: Lead nitrate solution is mixed with dilute hydrochloric acid and heated.