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The roasting of HgS in air produces :...

The roasting of HgS in air produces :

A

HgO

B

`HgSO_3`

C

`HgSO_4`

D

Hg

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The correct Answer is:
D
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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -Multiple Choice Questions - Level - II
  1. Copper pyrites , the chief ore of copper , is chemically :

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  2. Which of the following is malachite ore ?

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  3. The roasting of HgS in air produces :

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  4. The formula of siderite ore is

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  5. Copper is refined by :

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  6. which of the following is not a basic flux ?

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  7. An example of halide ore is :

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  8. The sulphide ores are generally concentrated by :

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  9. Carbon reduction method is used in the extraction of :

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  10. The process of removal of impurities form a crude metal is called :

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  11. The common depressant used in froth floatation process for separation ...

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  12. When copper ore is mixed with silica in a reverberatory furnace copper...

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  13. Which of the following reactions is an example of auto reduction ?

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  14. In the extraction of copper from its sulphide ore, the metal is formed...

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  15. Electrolytic refining is used to purify which of the following metal...

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

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  17. Coke is used in metallurgical process process chiefly as

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  18. Which of the following statement is not true ?

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  19. In the equation , 4M +8CN^(-) +2H2O+O2 rarr 4[M(CN)2]^(-)+4OH^(-), the...

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  20. Identify the reaction that does not take place in a blast furnace.

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