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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 is the chief reducing agent if the carbon reduction of iron oxides is carried out below `710^@C` ?

A

CO

B

C

C

Either C or CO

D

Cannot be predicted on the basis of given information.

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The correct Answer is:
A
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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?

Determining the directiom of spontaneity from electrode pot Na^(+)(aq.) + e^(-) rarr Na(s) E^(@) = -2.71 V entials : Predict from Table 3.1, whether Pb^(2+)(aq.) can oxidize Al(s) or Cu(s) under standard conditions. Calculate E^(ɵ) for each reaction at 25^(@)C . Strategy: To predict whether a redox reaction is spontaneous, remember that an oxidizing agent can oxidize any reducing agent that lies below it in the table but can't oxidize one that lies above it. Alternatively, write the expected reaction. Find the oxidizing agents in the equations, one is on the left side and the other on the right side. Locate these oxidizing agents in a table of electrode potentials (the oxidizing agent is on the left side of the reduction half-reaction). The stronger oxidizing agent is the one involved in the half-reaction with the more positive standard electrode potential.

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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