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प्रश्न
What are molecules ?
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उत्तर
Molecules are made of atoms. Molecules exhibit the properties of that kind of matter and has independent exi stance.
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संबंधित प्रश्न
Define the term matter. What is it composed of?
Name the terms for the particles of matter which may or may not have independent existence.
Write true or false for each statement. Rewrite the false statement correctly.
Matter cannot exist in different states.
Name the property which allows metals to be hammered into thin sheets.
What are the two types of pure substances? Give one example of each type.
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
What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids.
State whether colloidal solutions are homogeneous or heterogeneous.
What difference in the property of two miscible liquids enables their separation by fractional distillation ?
How will you separate a mixture containing sand and sugar ?
Which method is better for recovering sugar from sugar solution : evaporation or crystallisation ? Give reason
for your answer.
Pure copper sulphate can be obtained from an impure sample by the process of :
Explain the meaning of the term ‘matter’.
Differentiate between the-two characteristics of matter – ‘mass’ & ‘weight’.
What type of matter glass is?
The movement of particles in liquids is ______.
A teabag placed in a cup of hot water will diffuse into the water.
Define the term matter.
Define the term matter.
Define the term matter.
