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What is gangue and what is concentration...

What is gangue and what is concentration?

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Ore are usualy associated with unwanted earthly matter called gangue ( Sand, clay etc) and the removal of this unwanted impurities is called concentration. The ganguae has to be removed before the extraction of metals.
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CPC CAMBRIDGE PUBLICATION-METALS AND NON-METALS-ADDITIONAL QUESTIONS ( Answer the following)
  1. Give two examples of ore of aluminium?

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  2. Why do potato - chips manufactures fill the packest of chips with nitr...

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  3. What is gangue and what is concentration?

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  4. a. Write electron dot diagram for chlorine (At No. 17) and Calcium (At...

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  5. Identify the nature of above compound and explain three physical prope...

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  6. Give reasons for the following : (i) School bells are made up of met...

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  7. Give reasons for the following : (i) School bells are made up of met...

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  8. What asre amphoteric oxides? Choose the amphoteric oxide from among th...

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  9. Differentiate between roasting and calcination. Explain the two with...

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  10. Name two metals than can be used to reduce metal oxides of metals.

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  11. State reasons for the following: Electric wires are covered with rub...

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  12. Which of the following metals cannot liberate hydrogen from dilute ...

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  13. State reasons for the following: Sulphide ore of a metal is first co...

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  14. Write any four physical properties of metals.

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  15. Give examples of the least reactive metals.

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  16. Sodium and chlorine are poisonous substances but sodium chloride is ed...

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  17. Write balanced equations for the reactions of : (i) Aluminium when h...

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  18. Write balanced chemical equation for the reaction of: a. Al when hea...

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  19. Write balanced equations for the reactions of : (i) Aluminium when h...

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  20. (i) Explain the formation of ionic compound CaO with electron dot stru...

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