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(a) Why is it that only sulphide ore...

(a) Why is it that only sulphide ores are concentrated by froth floatation process ?
or Why is the froth floatation process selected for the concentrated of sulphide ores ?
(b) Which of the following ores can be concentrated by froth floatation method and why ?
` Fe_2O _ 3, ZnS, Al_2O _ 3 `

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Why is froth floatation process selected for the concentration of the sulphide ore ?

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PRADEEP-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -IMPORTANT QUESTIONS FOR BOARD EXAMINATION
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  2. What type of ores concentrated by electromagnetic separation ? Gi...

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  3. (a) Why is it that only sulphide ores are concentrated by frot...

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  4. Name a sulphide ore which is not concentrated by froth floatati...

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  5. A sample of galena is contaminated with zinc blende. Name one chemical...

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  6. What is the significance of leaching in the extraction of aluminium?

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  7. Why is it advantageous to roast a sulphide ore to the oxide before red...

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  8. Giving examples differentiate between roasting and calcination.

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  9. Suggest a condition unders which magnesium could reduce alumina.

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  10. How is cas iron different from pig iron ?

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  11. The choice of a reducing agent in a particular case depends on thermod...

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  12. The extraction of Au by leaching with NaCN both oxidation and reductio...

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  13. (a) During roasting most of the metals are converted into their ...

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  14. What is the principle of thermite process ? Name two meals which can ...

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  15. Write a non - exothermic reaction takind place in the blast fur...

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  16. Write down the reactions taking place in Blast furnace related t...

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  17. What is a slag ? Give one example.

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  18. How is copper extracted from a low grade ore of it ?

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  19. Which of the following metals cannot be extracted by the smelt...

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  20. What is the role of cryolite in the metallurgy of aluminium?

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