Suggest the action of `HNO_(3)` on non-metals. 

Write the structure of HNO_(3) .

Catalyst used in the manufacture of HNO_(3) in ostwald process is

What are non-metals?

Identify non- metals .

In the preparation of HNO_(3) by Ostwald process ammonia is

Write an experiment to know the reaction of oxygen with metals and non-metals.

Hydrogen is evolved by the action of cold dilute HNO_3 on

Give some examples for corroded and non corroded metals and give the reasons for non corrosion of metals.