MEDIUM
Chemistry
IMPORTANT
Earn 100
An inorganic salt when heated with concentrated , evolves a colourless pungent smelling gas but with concentrated and , evolves a coloured pungent smelling gas which bleaches moist litmus paper. The coloured gas is
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Important Questions on Theoretical Principles of Experimental Chemistry
MEDIUM
Chemistry
IMPORTANT
The chromyl chloride vapours are dissolved in water and acetic acid, and barium acetate solution is added, then:
MEDIUM
Chemistry
IMPORTANT
When layer containing both, and , is shaken with an excess of chlorine water, the violet colour due to disappears, and a pale yellow colour appears in the solution. The disappearance of violet colour and the appearance of pale yellow colour is due to the formation of
MEDIUM
Chemistry
IMPORTANT
A metal salt solution gives a yellow precipitate with silver nitrate. The precipitate dissolves in dilute nitric acid as well as in dilute ammonia solution. The solution contains:
EASY
Chemistry
IMPORTANT
Which of the following will not give a positive chromyl chloride test?
MEDIUM
Chemistry
IMPORTANT
A white sodium salt dissolves in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the solution, a white precipitate is obtained which does not dissolve in dilute . The anion is
EASY
Chemistry
IMPORTANT
A one litre flask is full of reddish brown bromine fumes. The intensity of brown colour of vapour will not decrease appreciably on adding to the flask some :
MEDIUM
Chemistry
IMPORTANT
A mixture of two colourless substances was dissolved in water. When gaseous was passed through the solution, containing small quantity of a violet colour developed in organic layer. Addition of to the original solution give a white precipitate. The mixture contains:
HARD
Chemistry
IMPORTANT
Nitrite interferes in the ring-test of nitrate . Some following reagents can be used for the removal of nitrite:
I : Potassium dichromate (s)
II : (urea)
III : (sulphamic acid)
IV: Zinc/sodium hydroxide
