State two conditions necessary for rusting of iron.

Very Short Answer

The presence of water and oxygen is essential for the rusting of iron.
Impurities in the iron, the presence of the water vapor, acids, salts and carbon dioxide hastens rusting.

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Chapter 8: Periodic Classification of Elements - Evaluation [Page 122]

Chapter 8 Periodic Classification of Elements
Evaluation | Q VI. 4. | Page 122

Which metals do not corrode easily?

Name any three objects (or structures) which are gradually damaged by the corrosion of iron and steel.

Name the metal which is used for galvanising iron.

With the help of labelled diagrams, describe an activity to find out the conditions under which iron rusts.

Give reason.

Copper and brass utensils should be tinned.

To prevent corrosion of iron and steel _______ method is used.

Find the correlation:

Bronze : ______ :: Tin : Cu+Zn.

Write scientific reason.

Coins are made from metals and alloys.

Give an example of a chemical reaction for the following situation:

Sound is produced

In ______ process a layer of molten tin is deposited on metals.