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What is the difference between calcinati...

What is the difference between calcination and roasting?

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Calcination is used in the decomposition of hydroxide and carbonate ores generally by heating them in absence of air.
Roasting is the oxidation of sulphide ores generally by heating them in excess of air.
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ICSE-CHEMISTRY 2011-SECTION-II
  1. During the electrolysis of copper (II) sulphate solution using platinu...

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  2. Name a metal which is found abundantly in the earth's crust.

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  3. What is the difference between calcination and roasting?

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  4. Name the process used for the enrichment of sulphide ore.

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  5. Write the chemical formulae of one main ore of iron and aluminium .

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  6. Write the constituents of electrolyte for the extraction of aluminium.

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  7. The diagram shows an experimental set up for the laboratory preparatio...

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  8. The diagram shows an experimental set up for the laboratory preparatio...

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  9. The diagram shows an experimental set up for the laboratory preparatio...

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  10. The diagram shows an experimental set up for the laboratory preparatio...

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  11. The diagram shows an experimental set up for the laboratory preparatio...

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  12. An organic compound with vapour density = 94 contains C=12.67%, H = ...

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  13. Calcuate the mass of 10^(22) atoms of sulphur. [ Atocmi mass S=32,...

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  14. Calculate the mass of 0.1 mole of carbon dioxide. [Atomic mass : S...

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  15. In the laboratory preparation of hydrochloric acid, HCl gas is dissolv...

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  16. In the laboratory preparation of hydrochloric acid, HCl gas is dissolv...

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  17. In the laboratory preparation of hydrochloric acid, HCl gas is dissolv...

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  18. In the laboratory preparation of hydrochloric acid, HCl gas is dissolv...

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  19. Choose the correct word/phrase from within the brackets to complete th...

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  20. When acetaldehyde is oxidised with acidified potassium dichromate, it ...

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