Sulphurous acid turns pink permanganate colourless and turns acidified dichromate green. Explain. 

Acid turn____into a different colours

Sulphurous acid is a bleaching agent base on sodium. Explain.

An ore is subjected to roasting on doing so, agus A is liberate and the metal is obtained in state. Il gas turns acidified dichromate paper green the one is

A white solid forms Rinmann's green in the charcoal cavity test in an oxidising flame. On treatment with dilute H_(2)SO_(4) this solid produces a gas that turns an acidified dichromate paper green and lead acetate paper black. The white solid is

On reaction with dil. H_(2)SO_(4) which of the following salts will give out a gas that turns an acidified dichromate paper green?

Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with (i) iron (II) ions (ii) SO_(2) and (iii) oxalic acid ? Write the ionic equations.

Red roses on exposure to moist chlorine permanently turns colourless. Explain.

How do you count the following observations? a) Though alkaline potassium permanganate and acidic potassium permanganate both are used as oxidants, yet in the manufacture of benzoic acid from toluene we use alcoholic potassium permanganate as an oxidant. Why ? Write balanced redox equation for the reaction. b) When concentrated sulphuric acid is added to inorganic mixture containing chloride, we get colourless pungent smelling gas HCl, but if the mixture contains bromide then we get red vapour of bromine. Why ?