State why aqua regia dissolves gold , which in insoluble in all other acids.

What is aqua regia ? How it dissolves gold?

What is aqua regia ? How it dissolves platinum?

State anyone use of aqua regia.

state true or false? Barium chromate is insoluble in dilute acetic acid

Write a test of sulphuric acid in which an insoluble white precipitate is formed.

A gas which dissolves in water to form the acid is known as.

State the composition of aqua regia . State which component is the oxidising agent in aqua regia.

Name : (a) a chloride which is insoluble in cold water but dissolves in hot water, (b) a chloride which is insoluble, (c) two sulphates which are insoluble.

For the preparation of hydrochloric acid in the laboratory 0=- I ] State why direct absorption of hydrogen gas in water is not feasible . Ii ] State what arrangement is used to dissolve hydrogen chloride gas in water.

Salt (A) makes part of electrode and is insoluble in water (A) is blackened by NH_(3) forming (B),(B) is soluble is equa regia forming (C ),(C ) gives orange ppt with KI but ppt dissolves in extcess of KI forming (D ) , identify (A),(B),(C ) and (D)