What is corrosion ? Describe the role of zinc in cathodic protection of iron. Can we use tin in place of zinc for this purpose. Give reason.

What is corrosion ? How is cathodic protection of iron different from its galvanisation ?

Which type of metal can be used in cathodic protection of iron against rusting.

Iron can be protected by coating with zinc or tin. If coating is broken.

Out of zinc and tin, whose coating is better to protect iron objects ?

Give reason for the following: Zinc granules are used in lab preparation of hydrogen

What happens when a zinc rod is dipped in copper sulfate solution ? Give the reason for this observation.

Give one word or phrase for the following: Process which protects iron from rusting, it is coated with a thin layer of zinc.

What would happen if the protective tin coating over an iron bucket is broken in some places ?

What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.

Choose from the following list of substances, as to what matches the description given below: [Acetylene gas, aqua fortis, coke, brass, barium chloride, bronze, platinum). (i) A black powdery substance used for the reduction of zinc oxide during its extraction. (ii) The substance is an alloy of zinc, copper and tin.