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Explain how it is possible to separate g...

Explain how it is possible to separate gold from river sand.

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Separation of gold from river sand can be carried out by allowing the sand to a swift stream of water. Sand particles being heavier and corse settle down while the fine lighter gold particles float.
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PEARSON IIT JEE FOUNDATION-MYSTERY OF MATTER-Short ans.
  1. Define the following. (a) Elements (b) Compound (c) Homogenous mixtu...

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  2. Name the gaseous non-metallic elements and the solid non-metallic elem...

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  3. Distinguish between metals and non-metals with respect to the followin...

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  4. Name the metalloids.

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  5. Distinguish between elements and compounds.

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  6. Identify the following. (a) The gaseous compound of two non-metals r...

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  7. X, Y and Z are three substance, On passage of electricity through X, t...

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  8. Sodium chloride is a compound is common salt a compound? Justify.

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  9. Identify whether the following are elements or compounds or mixtures G...

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  10. Mention the purposes for which separation of mixtures is important Giv...

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  11. The principle of separation of a mixture depends on which factors?

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  12. Alum increases the rate of sedimentation. Why?

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  13. Methods of Separation: Sieving, Sedimentation, Decantation, Filteratio...

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  14. Explain how it is possible to separate gold from river sand.

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  15. Differentiate between residue and filtrate.

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  16. Explain the principle involved in centrifugation.

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  17. Which method is employed for the separation of constituents from a het...

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  18. Name the process you would use to separte a mixture of water and alcoh...

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  19. A mixture of iron filings, saw dust and sugar is available . Explain t...

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  20. Explain the principle invovled in the making of coffee decoction.

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