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Extraction of gold and silver involves l...

Extraction of gold and silver involves leaching the metal with `CN^-` ion. The metal is recovered by ______________ .

A

displacement of metal by some other metal from the complex ion .

B

roasting of metal complex.

C

calcination followed by roasting.

D

thermal decomposition of metal complex.

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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE
  1. An ore of aluminium is

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  2. Electrolytic refining is used to purify which of the following metals ...

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  3. Extraction of gold and silver involves leaching the metal with CN^- io...

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  4. Answer the question on the basis of figure given below : Choose th...

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  5. Answer the question on the basis of figure given below : Below poi...

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  6. Answer the question on the basis of figure given below : For the r...

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  7. In the following questions two or more options may be correct. At the ...

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  8. In the following questions two or more options may be correct. Which o...

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  9. In the extraction of aluminium by Hall-Heroult process, purified Al2O3...

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  10. Which of the following statements is correct ?

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  11. In the Froth Floatation process, zinc sulphide and lead sulphide can b...

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  12. Common impurities present in bauxite are .

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  13. Which of the following ores are concentrated by froth floation ?

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  14. Which of the following reactions occur during calcination?

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  15. For the metallurgical process of the ores calcined ore can be reduced ...

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  16. The main reactions occurring in blast furnace during extraction of iro...

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  17. In which of the following method of purification, metal is converted t...

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  18. Which of the following statements are correct ?

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  19. Give the preparation of chlorine.

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  20. Match the items of Column I with items of Column II and assign the cor...

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