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प्रश्न
Indicate the principle behind the method used for the refining of zinc.
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उत्तर
Zinc is refined using electrolytic refining process. In this process, pure zinc is transported to cathode from the impure sample at anode. The more basic metal remains in the electrolytic solution and the less basic metals, present as impurities, precipitate as anode mud.
| Electrode | Chemical Reaction |
| Anode | Zn → Zn2+ + 2e- (From anode) |
| Cathode | Zn2+ + 2e- → Zn (From electrolyte) |
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संबंधित प्रश्न
Write the names and chemical formulae of any one ore of zinc.
Write the names and chemical formulae of any one ore of iron.
Write chemical formulae of the following ores :
(a) Calamine
(b) Haematite
(c) Magnetite
(d) Corundum
Out of C and CO, which is a better reducing agent at the lower temperature range in the blast furnace to extract iron from the oxide ore?
Draw a neat, well labelled diagram of electrolytic cell for extraction of aluminium
Describe the role of the cryolite in the extraction of aluminium from pure alumina.
When a strip of metallic zinc is placed in an aqueous solution of copper nitrate the blue colour of the solution disappear due to formation of
Which of the following is not an ore of magnesiuim?
Pyrolusite is ______.
Match List I with List II.
| List - I | List - II | ||
| a. | Siderite | I. | FeCO3 |
| b. | Malachite | II. | CuCO3 · Cu(OH)2 |
| c. | Sphalerite | III. | ZnS |
| d. | Calamine | IV. | ZnCO3 |
Choose the correct answer from the option given below.
