A test tube containing a nitrate and another containing a bromide and $Mn{O}_{2}MnO\_2$ are treated with conc.$H_{2}S{O}_{4}H\_2SO\_4$. The brown fumes evolved are passed into water. The water will be coloured by

An inorganic salt when heated evolves a coloured gas which bleaches moist litmus paper. The evolved gas is

A salt is heated first with dil.$H_{2}S{O}_{4}H\_2SO\_4$ and then with conc.$H_{2}S{O}_{4}H\_2SO\_4$. No reaction takes place. It may be

Chromyl chloride vapours are dissolved in water and acetic acid and lead acetate solution is added, then

The acidic solution of a salt produced a deep blue colour with strach iodide solution. The salt may be

For the test of halides, the soda extract is acidified with

A salt solution is acidified with dil. HCl and $BaC{l}_{2}BaCl\_2$ solution is added. A white precipitate is formed. The salt contains

Concentrated nitric acid is added before proceeding to test for group III members. This is to

Which of the following can be used in place $N{H}_{4}ClNH\_4Cl$ for the identification of the third radicals?

On addition of aqueous NaOH to a salt solution, a white gelatinous precipitate is formed, which dissolves in excess alkali. The salt solution contains