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The Elingham diagram (Fig.) represents t...

The Elingham diagram (Fig.) represents the formation of oxides of several metals together with oxides of C(i.e., CO and `CO_2` ). The diagram is not to scale yet it can help in making a lot of predictions.

Which of following statements is incorrect?

A

Si cannot reduce MgO at all

B

Al can reduce MgO at above `1500^@ C`

C

Al can reduce `Cr_2O_3` as well as `TiO_2`

D

Al cannot reduce ZnO but Mg can reduce ZnO.

Text Solution

Verified by Experts

The correct Answer is:
D
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MOTION-METALLURGY-EXERCISE 1
  1. Which of the following curves assures that the metal obtained by carbo...

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

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  3. The purest variety of iron is called

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

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

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

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  7. A reaction showing slag formation is .

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

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

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  10. Tin and lead can be refined by

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  11. Refining of silver is done by :

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  12. CO on passing over heated nickel gives

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

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

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  15. Mond's process is used for

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  16. In the Hoope’s process for refining of aluminium, the fused materials ...

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  17. The oxidation numbers of Fe and S in iron pyrites are

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  18. Extraction of zinc from zinc blende is achieved by:

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  19. Oxidation states of the metal in the minerals haematite and magnetite,...

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  20. In the extraction of nickel of Mond's process, the metal is obtained b...

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