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Which of the following match are incorre...

Which of the following match are incorrect

A

Goldschmidt aluminothermite process `Cr_(2)O_(3)`

B

Mac Arther cyanide process `-Fe`

C

Mond process `-Ni`

D

Van Arkel process `-Au`

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The correct Answer is:
B, D
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ALLEN-METALLURGY-EXERCISE-02
  1. Which of the following processes involves smelting

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  2. Out of the following which ores are calcinated during extraction (a)...

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  3. Which of the following match are incorrect

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  4. Malachite on calcination gives rarr 'A' + CO(2) +H(2)O. Compound 'A'...

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  5. Which of the following ores are calcinared during extraction

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  6. Which process of purification is represented by the following reaction...

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  7. Which are correctly is matched

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  8. Which of the following reactions is not involved in serpeck's process ...

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  9. Impure Ni + 4CO overset(60-80^(@)C)to Ni(CO)(4)overset(180^(@)C)to Ni+...

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  10. Neutral refractory material used in furnaces is :

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

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  12. From the following flowsheet for the extraction of pure metal, answer ...

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  13. Of the following reduction processes, correct processes are :

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

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

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  16. Ag(2)S + NaCN rarr (A),(A) + Zn rarr (B) (B) is a metal. Hence, (A) ...

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  17. The elemental phosphorus is made from rock phosphate, Ca(3)(PO(4))(2) ...

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  18. A: Bauxite is purified by leaching process R: Aluminium oxide reacts ...

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  19. The process which do use catalysts are

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  20. Metallury involves steps :

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