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प्रश्न
Which of the following ores are concentrated by froth floation?
(i) Haematite
(ii) Galena
(iii) Copper pyrites
(iv) Magnetite
उत्तर
(ii) Galena
(iii) Copper pyrites
Explanation:
Sulphide ores like galena \[\ce{(PbS)}\] and copper pyrites \[\ce{(CuFeS2)}\] are concentrated by froth floatation.
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संबंधित प्रश्न
Write the principle behind the froth floatation process. What is the role of collectors in this process?
What is the role of depressant in froth floatation process?
What is the role of depressants in the froth floatation process?
Write the principles of the following methods :
Froth floatation method
Which process is usually applied for separating gangue from sulphide ores?
Which of the following statements is correct about the role of substances added in the froth floation process?
(i) Collectors enhance the non-wettability of the mineral particles.
(ii) Collectors enhance the wettability of gangue particles.
(iii) By using depressants in the process two sulphide ores can be separated.
(iv) Froth stabilisers decrease wettability of gangue.
In the Froth Floatation process, zinc sulphide and lead sulphide can be separated by:
(i) using collectors.
(ii) adjusting the proportion of oil to water.
(iii) using depressant.
(iv) using froth stabilisers.
How do we separate two sulphide ores by Froth Floatation Method? Explain with an example.
Match items of Column I with the items of Column II and assign the correct code:
| Column I | Column II |
| (A) Cyanide process | (1) Ultrapure \[\ce{Ge}\] |
| (B) Froth Floatation Process | (2) Dressing of \[\ce{ZnS}\] |
| (C) Electrolytic reduction | (3) Extraction of \[\ce{Al}\] |
| (D) Zone refining | (4) Extraction of \[\ce{Au}\] |
| (5) Purification of \[\ce{Ni}\] |
Match items of Column I with the items of Column II and assign the correct code:
| Column I | Column II |
| (A) Sapphire | (1) \[\ce{Al2O3}\] |
| (B) Sphalerit | (2) \[\ce{NaCN}\] |
| (C) Depressan | (3) \[\ce{Co}\] |
| (D) Corundum | (4) \[\ce{ZnS}\] |
| (5) \[\ce{Fe2O3}\] |
