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प्रश्न
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
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उत्तर
A mixture of kerosene and petrol can be separated by fractional distillation.
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संबंधित प्रश्न
Name the terms for the change of vapour into a liquid.
Define the following term of Atom .
Name a non-metal which is a good conductor of electricity.
Which of the following are ‘pure substances’ ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
Which of the following substances are elements ?
Water, Salt, Mercury, Iron, Marble, Diamond, Wood, Nitrogen, Air, Graphite, Hydrogen, Oxygen, Sugar, Chlorine
Name a non-metal :
- which is lustrous
- which is required for combustion
- whose one of the allotrophic forms is a good conductor of electricity. Name the allotrope.
- other than carbon which shows allotropy
- which is known to form the largest number of compounds
The elements which normally exist in the liquid state are :
State whether the following statement is true or false :
Bread is an example of solid foam.
Choose one term from the following which includes the other three :
aerosol, emulsion, colloid, sol
Which of the following is a sol ?
Shaving cream, Milk, Fog, Soap solution, Hairspray
How would you prepare a saturated solution of sodium chloride in water at 25°C ? What will happen if this solution is cooled to 10°C ?
Name the process which can be used to recover salt from an aqueous salt solution.
How would you separate iodine from a mixture of iodine and common salt ?
Explain how, nitrogen , oxygen and argon gases are separated from air.
Which of the following mixture cannot be separated by using water as the solvent ?
Which of the following cannot be separated from air by the process of fractional distillation ?
The boiling point of liquid argon is :
______ is a smallest particle.
Liquids cannot be compressed and they have fixed volume.
Evaporation does form bubbles.
