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प्रश्न
Name the main metal present in the following:
Chalk
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उत्तर
Chalk - Calcium
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संबंधित प्रश्न
Name the main metal present in the following:
Chlorophyll
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
Sedimentation and decantation
Fill in the blank
_______ are made up of same kind of atoms.
Fill in the blank
A pure substance has definite _______ and constant _________.
Fill in the blank
Use of a __________ to separate the components of a mixture of solids is based on the difference in the size of the components.
Write true or false
All pure substances have characteristic melting and boiling points.
Differentiate between the following.
solution and suspension
What is centrifugation ? Also write the principle on which it works.
Name the techniques used to separate a solid from its solution.
Write the differences between elements and compounds and give an example for each.
