Cold dilute nitric acid reacts with copper to form .
(hydrogen, nitrogen dioxide, nitric oxide).

Give balanced equation for the following

Laboratory preparation of nitric acid.

Give balanced equation for the following.

Action of heat on a mixture of copper and nitric acid.

Identify the acid

 Which is used for the preparation of non-volatile acid.

Identify the acid

The acid which is prepared by catalytic oxidation of ammonia.

Explain the following : 

Dil. ${\mathrm{HNO}}_3$ is generally considered a typical acid but not so in the reaction with metals.

Explain the following :

When it is left standing in a glass bottle concentrated nitric acid appears yellow. 

Explain the following :

In the laboratory preparation of nitric acid an all glass apparatus is used.