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प्रश्न
Fill in the following blank :
A colloid is a ..............mixture and its components can be separated by the technique known as ...............
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उत्तर
A colloid is a heterogeneous mixture and its components can be separated by the technique known as centrifugation.
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संबंधित प्रश्न
Match the following
| Column A | Column B | ||
| (a) | Molecules | (i) | Water boils |
| (b) | 100° C | (ii) | Evaporation |
| (c) | 0° C | (iii) | Changes from solid to gas |
| (d) | At all temperatures | (iv) | Matter |
| (e) | Camphor | (v) | Water freezes |
Give one difference between atoms and molecules.
Fill in the blank
All matter is made up of tiny particles called ______
What are the conditions for 'something' to be called 'matter'?
When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine vapour diffuse into air. Explain how bromine vapour diffuse into air.
Which of the following are not compounds ?
Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond
The elements which normally exist in the liquid state are :
Choose the correct answer.
A 15% alcohol solution means :
Which of the following represents the solubility of sugar in water at 20°C ?
Name the process by which common salt is obtained from sea-water.
Name the process by which all the dye can be recovered from black ink.
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water ?
How would you separate iodine from a mixture of iodine and common salt ?
How is the impurity of iron present in several substances removed in industries ?
How is cream separated from milk ?
Explain how, impure copper sulphate can be purified by crystallisation.
What is fractional distillation ? What is the use of fractionating column in fractional distillation ?
Define the term matter.
Define the term matter.
