Sodium nitrate reacting with whom produces nitric acid?

_________ is very strong mono basic acid.

In the free state, is found in rain water, where it occurs in traces after lightning.

In the combined state, HNO₃ is found in the form of metallic

Nitric acid in its pure state is colourless but laboratory nitric acid is slightly yellow or brown due to dissolved

--------- is a powerful oxidising agent.

Aqua regia is a mixture of

Nitric acid turns a paper soaked in potassium iodide solution brown due to liberation of

Sulphur can be converted to sulphuric acid using