(a) Name a metal for each case:
(i) It does not react with cold as well as hot water but reacts with steam.
(ii) It does not react with any physical state of water.
(b) When calcium metal is added to water, the gas evolved does not catch fire, but the same gas evolved on adding sodium metal to water catches fire. Why is it so?

What are amphoteric oxides? Give an example.

Why is sodium kept immersed in kerosene oil? 

Answer the following:

Why are highly reactive metals such as Aluminium is used as reducing agents?

Attempt the following:

The metal sodium is kept immersed in Kerosene oil in the school laboratory. Why it is not kept the open?

Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas?

Food cans are coated with tin and not with zinc because

Give reason:

Metals like sodium and potassium are stored under oil.