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False statement is –...

False statement is –

A

Mond’s process is used for refining of nickel

B

Gold is extracted by cyanide process

C

Calcination of an ore requires excess of air

D

Millerite is an ore of nicke

Text Solution

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The correct Answer is:
C
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MOTION-METALLURGY-EXERCISE 1
  1. Heating of carbonates to remove carbon is called as –

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  2. Which one of the following is not a basic flux –

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  3. False statement is –

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  4. Which one of the following reactions is an example for calcination pro...

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  5. Match List-I (Metal) with List-II (Process of Extraction) and select t...

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  6. When a sulphide ore is roasted, the product obtained is usually –

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  7. Which of the following curves assures that the metal obtained by carbo...

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  8. Which of the following activities is not related to poling ?

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  9. The purest variety of iron is called

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  10. The Elingham diagram (Fig.) represents the formation of oxides of seve...

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  11. The Elingham diagram (Fig.) represents the formation of oxides of seve...

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  12. The slag obtained during the extraction of copper from coper pyrites i...

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  13. A reaction showing slag formation is .

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  14. In the metallurgy of iron, when limestone is added to the blast furnac...

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  15. A flux is often added to remove impurities from a concentrated ore. ...

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  16. Tin and lead can be refined by

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  17. Refining of silver is done by :

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  18. CO on passing over heated nickel gives

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  19. (xiii) Which process represents the change, Ti + 2I(2) rarr TiI(4) r...

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  20. Purification of Silicon element used in semiconductors is done by .

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