State what is observed when:
Nitric acid is kept in a reagent bottle for a long time.
Brown vapours are seen in the bottle and the nitric acid turns yellowish in colour.
State what is observed when:
Excess of ammonia a passed through an aqueous solution of lead nitrate
Explain why only all-glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate.
Concentrated sulphuric acid si both an oxidising agent and a non-volatile acid.
Write one equation each to illustrate the above-mentioned properties of a sulphuric acid.
Write balanced chemical equations for the following reactions:
Ethane and oxygen in the presence of molybdenum oxide