Recent questions tagged pure substances

+2 votes

1 answer

Give reasons for the following : Sulphur and charcoal powder cannot be separated by magnetic separation.

asked Apr 4, 2019 by kratos

+1 vote

1 answer

What are the homogeneous and heterogeneous catalysts ? Explain with examples.

asked Mar 26, 2019 in Chemistry by kratos

+2 votes

1 answer

Draw a neat labelled diagram for separation of the following mixtures. Sand and water w ithout using a filter paper

asked Mar 24, 2019 by kratos

+1 vote

1 answer

Why alum is added for purification of water ?

asked Mar 23, 2019 in JEE by kratos

+1 vote

1 answer

List four characteristics of a mixture.

asked Mar 18, 2019 by kratos

+2 votes

1 answer

State the principle involved in the process of sublimation.

asked Mar 11, 2019 in Chemistry by kratos

+3 votes

1 answer

Give reasons for the following : Two varieties of wheat flour cannot be separated by sieving.

asked Mar 11, 2019 by kratos

+1 vote

1 answer

Which one is not observed when carbon disulphide is added to a mixture of iron fillings and sulphur powder taken in a test tube ?

asked Mar 10, 2019 in Class 9 by kratos

+1 vote

1 answer

Name the process by which the components of following mixtures can be separated. (a) Powdered glass and sugar b) Chalk powder and iron filings

asked Mar 8, 2019 by kratos

+3 votes

1 answer

State the main components of the following alloys : (i) Brass. (ii) Duralumin. (iii) Bronze

asked Mar 4, 2019 in Class 10 by kratos

+3 votes

1 answer

A mixture of camphor and benzoic acid can be separated by :

asked Mar 3, 2019 in Chemistry by kratos

+1 vote

1 answer

The process by which common salt is separated from its solution in water is:

asked Feb 16, 2019 in Class 10 by kratos

+1 vote

1 answer

Name the components present in the following mixtures: (a) Brass (b) Duralumin (c) Tap water (d) Bronze (e) Crude petroleum oil .

asked Feb 14, 2019 by kratos

+3 votes

1 answer

Explain the technique for separating – insoluble solid particles in a solid-liquid mixture.

asked Feb 10, 2019 by kratos

+3 votes

1 answer

Define: (a) Filtration (b) Sublimation (c) Evaporation (d) Crystallisation (e) Miscible liquids (f) Immiscible liquids

asked Feb 9, 2019 by kratos

+1 vote

1 answer

Ether and benzene can be separated by - (a) Filtration (b) Distillation

asked Feb 7, 2019 in Chemistry by kratos

+3 votes

1 answer

Draw a neat labelled diagram for separation of the following mixtures. Naphthalene from sodium chloride

asked Feb 4, 2019 by kratos

+3 votes

1 answer

In which of the following mixtures, the separation of the compound may be done by using a magnet ?

asked Feb 4, 2019 in Class 9 by kratos

+2 votes

1 answer

Miscible liquids having slightly different boiling points can be separated by the 1. evaporation 2. distillation

asked Feb 2, 2019 in Chemistry by kratos

+2 votes

1 answer

Name the following The component of the soluble solid-liquid mixture, which is lost to the atmosphere on heating.

asked Jan 25, 2019 by kratos

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