Question

1. State four differeces between compounds and
mixtures.
What are the characterstic properties of a pure
substance ? Why do we need them?
3. Give two examples for each of the following:
(a) Solid + Solid mixture
(b) Solid + Liquid mixure
(c) Liquid + Liquid mixture
4. Define :
(a) Evaporation (b) Filtration
(c) Sublimation (d) Distillation
(e) Miscible liquids (f) Immiscible liquids
5. Name the process by which the components of
following mixtures can be separated.
(a) Iron and sulphur
(b) Ammonium chloride and sand
(c) Common salt from sea water
(d) Chaff and grain
(e) Water and mustard oil
) Sugar and water
(8) Cream from milk
6. How will you separate a mixture of common
salt, chalk powder and powdered camphor ?
Explain.
7. How is distillation more advantageous than
evaporation ?
8. (a) What is chromatography ?
(b) Why is it named so?
· (c) What are the advantages of
chromatography ?
(d) Name the simplest type of chromatography?
(e) On what principle is this method based ?
(f) What is meant by stationary phase and
mobile phase in chromatography ?
9. On what principle are the following methods of
separation based ? Give one example of a
mixture for each of the methods mentioned in
which they are used
(a) Sublimation
(b) Filtration
(c) Sedimentation and decantation
(d) Solvent extraction method
(e) Magnetic separation
(f) By using a separating funnel
(8) Fractional distillation.​

Answer 1

Answer:

Explanation: ko