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The reaction 2ZnS +3O(2) rarr2ZnO +2SO(2...

The reaction `2ZnS +3O_(2) rarr2ZnO +2SO_(2)` in the metallurgical process of zinc is called

A

Calcination

B

Cupellation

C

Smelting

D

Roasting

Text Solution

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The correct Answer is:
D
Roasting (Sulphide ore is heated in excess of air)
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Chief ore of Zn is ZnS . The ore is concentrated by froth flotation process and then heated in air to convert ZnS to ZnO . ltntgt 2 ZnS + 3O_(2) rarr 2 ZnO + 2 SO_(2) …(i) ZnO , thus formed is treated with dilute H_(2) SO_(4) . ZnO + H_(2) SO_(4) rarr ZnSO_(4) + H_(2) O ....(ii) On electrolysis of ZnSO_(4(aq)), Zn metal is produced. 2 ZnSO_(4) + H_(2) O rarr 2 Zn + 2H_(2) SO_(4) + O_(2) ....(iii) How many kilomoles of NaOH are required to dissolve all the ZnO produced in reaction (ii) ?

Chief ore of Zn is ZnS . The ore is concentrated by froth flotation process and then heated in air to convert ZnS to ZnO . ltntgt 2 ZnS + 3O_(2) rarr 2 ZnO + 2 SO_(2) …(i) ZnO , thus formed is treated with dilute H_(2) SO_(4) . ZnO + H_(2) SO_(4) rarr ZnSO_(4) + H_(2) O ....(ii) On electrolysis of ZnSO_(4(aq)), Zn metal is produced. 2 ZnSO_(4) + H_(2) O rarr 2 Zn + 2H_(2) SO_(4) + O_(2) ....(iii) ZnO on dissolution in NaOH gives

Chief ore of Zn is ZnS . The ore is concentrated by froth flotation process and then heated in air to convert ZnS to ZnO . ltntgt 2 ZnS + 3O_(2) rarr 2 ZnO + 2 SO_(2) …(i) ZnO , thus formed is treated with dilute H_(2) SO_(4) . ZnO + H_(2) SO_(4) rarr ZnSO_(4) + H_(2) O ....(ii) On electrolysis of ZnSO_(4(aq)), Zn metal is produced. 2 ZnSO_(4) + H_(2) O rarr 2 Zn + 2H_(2) SO_(4) + O_(2) ....(iii) What mass of Zn will be obtained from an ore containing 225 kg of ZnS ? (Zn = 65, S = 32, O = 16, H = 1) .

Chief ore of Zn is ZnS . The ore is concentrated by froth flotation process and then heated in air to convert ZnS to ZnO . ltntgt 2 ZnS + 3O_(2) rarr 2 ZnO + 2 SO_(2) …(i) ZnO , thus formed is treated with dilute H_(2) SO_(4) . ZnO + H_(2) SO_(4) rarr ZnSO_(4) + H_(2) O ....(ii) On electrolysis of ZnSO_(4(aq)), Zn metal is produced. 2 ZnSO_(4) + H_(2) O rarr 2 Zn + 2H_(2) SO_(4) + O_(2) ....(iii) What volume of 98 % H_(2) SO_(4) (by weight, density = 1.8 g//mL ) is required in step (ii) ?

Find the formula of A ZnS + O_(2) rarr (A) + SO_(2) .

A2Z-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF METALS-Metallurgy Of Cu, Fe, Ag, Al, Zn, And Au
  1. Which of the following metal is extracted by amalgamation process?

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  2. Leaching of Ag(2)S is carried out by heating it with a dilute solution...

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  3. The reaction 2ZnS +3O(2) rarr2ZnO +2SO(2) in the metallurgical process...

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  4. In Mac Arthur Forest method, silver is extracted from the solution of ...

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  5. In blast furnace, the highest temperature is in

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  6. In which of the following pair of metals, both are commerically extrac...

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  7. During extraction of Fe, slag obtained is

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  8. Silver from argentiferous lead is obtained by

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  9. The final step for the extraction of copper from copper pyrite in Bess...

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  10. Purpose of coke in the blast furnace is

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  11. How is limestone used in Fe extraction?

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  12. Main source of lead is PbS. It is convered to Pb by: Self- reduct...

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  13. Heating mixture of Cu(2)Oand Cu(2)S will give

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  14. In blast furnace, the hearth is lined with

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  15. Aluminothermic process is used for the extraction of metals, whose oxi...

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  16. The major role of flourspar, CaF(2) which is added in small amount in ...

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  17. In blast furnace, iron oxide is reduced by

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  18. In zone refining, pure metal is obtained at the

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  19. The sunstance used in the thermite process of reducing metal ores is

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  20. Which of the following has lowest carbon content?

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