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प्रश्न
Fill in the blank:
________ and _______ are pure substances.
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उत्तर
Elements and compounds are pure substances.
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संबंधित प्रश्न
Give four examples of non-metallic elements.
What do you understand by :
Metalloids
Why is it named so?
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
By using a separating funnel
Fill in the blank
_______ are made up of same kind of atoms.
Fill in the blank:
_________ is a process to obtain a very pure form of a solid dissolved in a liquid.
Fill in the blank.
_________ is used when the constituents of a mixture of solids have a difference in their weights.
Differentiate between the following.
solution and suspension
Why is filtration a better technique than sedimentation and decantation ?
Write the differences between elements and compounds and give an example for each.
