Question

give reason

1. aluminium easily combines with oxygen but still it can be used for making kitchen utensils.

2. sodium , pottassium and calcium metals form hydrates by combination with hydrogen gas but most other metals donot.

3. dry fruit plastic bags sold in the market are filled with nitrogen gas instead of air.

4. gold and silver often occur in their native state

5. blue colour of copper sulphate is destroyed when iron fillings are added to it

6. sodium metal is stored under kerosene oil

7. silver does not displace hydrogen fromdilute acid solution

Answer 1

because highly stable and reactive