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Valachite on calcination gives rarr 'A' ...

Valachite on calcination gives `rarr 'A' + CO_(2) +H_(2)O`. Compound 'A' on reduction with carbon gives `rarr CO +'B'` Here 'A' and 'B' are

A

`Fe_(2)O_(3), Fe`

B

`CuO, Cu`

C

`CuCO_(3),CuO`

D

`MgO, Mg`

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The correct Answer is:
B
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ALLEN-METALLURGY-EXERCISE-02
  1. Out of the following which ores are calcinated during extraction (a)...

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  2. Which of the following match are incorrect

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  3. Valachite on calcination gives rarr 'A' + CO(2) +H(2)O. Compound 'A' o...

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  4. Which of the following ores are calcinared during extraction

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  5. Which method of purification is represented by the following equations...

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  6. Which are correctly is matched

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  7. Which of the following reaction is a part of Serpeck's process

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  8. (xiv) Following equation represents a method of purification of nickel...

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  9. Which substance is used as basic refractory material in furnace

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  10. Carbon cannot be used in the reduction of A1(2)O(3) because:

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  11. Which of the following reaction is not involved in themite process

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  12. Which of the following reduction processes are correct

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  13. Consider the following steps: Cu(2)S overset("roast in air")rarr A o...

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  14. Main source of lead is galena (PbS). It is converted to Pb by : S...

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  15. Ag(2)S +NaCN rarr (a) (a) +Zn rarr (d) (b) is a metal. Hence (a) a...

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  16. Ca(3)(PO(4))(2) is :

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  17. Bauxite is purified by

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  18. The process which do use catalysts are

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  19. Metallury involves steps :

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  20. Which of the following metals are extracted by electrolytic reduction?

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