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Which one of the following ores is not c...

Which one of the following ores is not concentrated by froth floatation process ?

A

Copper pyrates

B

Pentalandite

C

Pyrolusive

D

Zinc blende

Text Solution

Verified by Experts

The correct Answer is:
C
Pyrolusite (`MnO_2` is not concentrated by froth floatation process.
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DINESH PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-REVISION QUESTIONS FROM COMPETITIVE EXAMS.
  1. Pyrolusite is a/an

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  2. The common method of extraction of metals from oxide ores is

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  3. Which one of the following ores is not concentrated by froth floatatio...

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  4. Sulphide ores are generally concentrated by

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  5. The metal which cannot be obtained by electrolysis of aqueous solution...

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  6. The least stable oxide at room temperature is

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  7. What is insoluble in water ?

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  8. Which of the following is magnetite ?

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  9. Refractory materials are generally used in furnaces because

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  10. Which of the following is an ore of aluminium ?

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  11. The method of zone relining of metal is based on the principle of AIFM...

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  12. Process of heating ore is air to remove sulphur is:

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  13. The formula of azurite is :

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  14. Heating of ore in presence of air to remove sulphure impurities is cal...

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  15. Vapour phase refining of nickel is carried out using

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  16. Thomas slag is

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  17. In Mc-Arthur Forrest method silver is extracted from the solution of N...

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  18. During the extraction of iron, slag produced is

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  19. Silver containing lead as an impurity is not purified by

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  20. Out of the following matals that cannot be obtained by electrolysis of...

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