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प्रश्न
Classify the following into elements, compounds and mixtures :
arble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
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उत्तर
Elements: Gold and Diamond
Compounds: Common salt and marble
Mixtures: Brass and seawater.
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संबंधित प्रश्न
Intermolecular space is maximum in .......... less in ............ and the least in .........
The inter-molecular force is maximum in
What do you mean by the inter-molecular spaces? How do they vary in different states of matter?
Write true or false for each statement. Rewrite the false statement correctly.
Matter cannot exist in different states.
Classify the following into elements, compounds and mixtures:
- Sodium
- Soil
- Sugar solution
- Silver
- Calcium carbonate
- Tin
- Silicon
- Coal
- Air
- Soap
- Methane
- Carbon dioxide
- Blood
Fill in the following blank with suitable words :
The best evidence that the particles of matter are constantly moving comes from the studies of ................. and ...................
What name is given to those elements which are neither good conductors of electricity like copper nor insulators like sulphur ?
Which of the following substances are elements ?
Water, Salt, Mercury, Iron, Marble, Diamond, Wood, Nitrogen, Air, Graphite, Hydrogen, Oxygen, Sugar, Chlorine
State whether colloidal solutions are homogeneous or heterogeneous.
Choose the correct answer.
A 5 per cent sugar solution means that :
Fill in the following blank :
A colloid is a ..............mixture and its components can be separated by the technique known as ...............
What is meant by a solution?
Name the process you would use to separate a mixture of water and alcohol.
Fill in the following blanks with suitable words :
Miscible liquids are separated by .....................
Which method is better for recovering sugar from sugar solution : evaporation or crystallisation ? Give reason
for your answer.
Diffentiate between absorption and adsorption.
In Aerosol the dispersed phase is liquid and the dispersion medium is gas.
Atoms are tiny particles that repel each other when they are squeezed very close.
Define the term matter.
Define the term matter.
