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In the equation: M+8CN^(-)+2H(2)O+O(2)...

In the equation:
`M+8CN^(-)+2H_(2)O+O_(2)to4[M(CN)_(2)]^(-)+4OH^(-)` metal M is:

A

Copper

B

Iron

C

Silver

D

Zinc

Text Solution

Verified by Experts

The correct Answer is:
C
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Following reactions take place during extraction of gold 4Au+8CN^(-)+ 2H_(2)O + O_(2) to 4[Au(CN)_(2)]^(-)+ 4OH^(-) 2[Au(CN)_(2)]^(-) + Zn to 2Au + [Zn(CN)_(4)]^(2-) Zinc in the extraction of gold acts as a/an

Name the metal M which is extracted on the basis of following reactions : 4M + 8CN^(-)+2H_(2)O+O_(2) rarr 4[M(CN)_(2)]^(-)+4OH^(-) 2[M(CN)_(2)]^(-)+Zn rarr [Zn(CN)_(4)]^(2-)+ 2M

MOTION-METALLURGY-EXERCISE 1
  1. Concentration of copper pyrites is done by -

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  2. Which of the following metals is obtained by leaching out process usin...

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  3. In the equation: M+8CN^(-)+2H(2)O+O(2)to4[M(CN)(2)]^(-)+4OH^(-) meta...

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  4. Mac-Aurthur forrest process is used for the extraction of –

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  5. Leaching is a process of

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  6. Which of the following is concentrated by electromagnetic method –

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  7. In froath floatation, the oil used is –

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  8. Baeyer’s process is used for the purification of Bauxite containing .....

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  9. An ore of tin containing FeCrO(4) is concentrated by

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  10. Heating pyrities in air to remove sulphur is called

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  11. Purpose of smelting of an one ore is –

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  12. The substance used in the thermite process of reducing metal ores is

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  13. The aim of addition of flux along with the ore during smelting is

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  14. Which one of the following metals is extracted by carbon reduction pro...

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  15. The common method for the extraction of metals from oxide ores involve...

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  16. Specific gravity of slag is

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  17. Heating of carbonates to remove carbon is called as –

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  18. Which one of the following is not a basic flux –

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  19. False statement is –

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  20. Which one of the following reactions is an example for calcination pro...

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