9.2 Nitric Acid — Chemistry STD 10 — Question

Identify the substance underlined, in the following case: A solid formed by reaction of two gaes, one of which is acidic and the other basic in nature.

How is ammonia collected?

State two observations when
Lead nitrate crystals are heated in a hard glass test tube.

Name the following:
A chloride which is soluble in excess of ammonium hydroxide.

Give a reason for the following:
A graphite anode is preferred to other inert electrodes during electrolysis of fused lead bromide.

Name a compound prepared by ammonia and is used as laboratory reagent.

When ammonium hydroxide is added to a solution B, a pale blue precipitate is formed. The pale blue precipitate dissolves in excess of ammonium hydroxide to give an inky blue solution. What is the cation (positive ion) present in solution B? What is the probable colour of solution B?

Strong acid containing chlorine.

A black colour oxide of metal changes to reddish colour when heated and ammonia gas passed over it.