EASY
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Brown coloured gas is evolved when ferrous sulphate is heated.

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Important Questions on The d- and f-Block Elements

HARD
Electrolysis of sodium chloride produces a gas A when A is passed through a solution of compound B another compound C is formed which is used as an oxidising agent in many chemical industries. A, B, and C will be respectively:
EASY
The real bleaching agent present in bleaching powder is 
MEDIUM
Which of the following compounds is used to repair fractured bones?
MEDIUM

Read the following statements.

Statement - I: Plaster of Paris is stored in moisture proof containers.

Statement - II: Plaster of Paris on reaction with water changes into a hard solid gypsum. 

Select the correct answer from the options given below:

MEDIUM
Which of the following is used to purify drinking water?
MEDIUM
The water of crystallization in gypsum and plaster of paris respectively are-
HARD
In chemical reaction of potassium ferrocyanide and hydrogen peroxide in the presence of dil. H2SO4
EASY
Name the reactants used for the preparation of iron (II) sulphate.
EASY
Which chemical reaction correctly represents the reaction between iron and dilute H2SO4?