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Which of the following ores can be conce...

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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Assertion : Sulphide ores are concentrated by Froth Floatation method. Reason : Cresols stabilise the froth in Froth Floatation method

ICSE-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) (SHORT ANSWER QUESTIONS)
  1. Which solution is used for the leaching of silver metal in the presenc...

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  2. (a) Which solution is used for the leaching of silver metal in the pr...

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  3. Which of the following ores can be concentrated by froth floatation me...

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  4. What is the role of silica in the metallurgy of copper.

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  5. Name the method used for removing gangue from sulfide ores.

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  6. How is wrought iron different from steel?

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  7. Name the principal ore of aluminium. Explain the significance of leach...

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  8. Predict the modes of occurrence of the following three types of metals...

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  9. Name the chief forms of the occurrence of the following in the earth's...

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  10. Discuss some of the factors which need consideration before deciding o...

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  11. What is the difference between a rock and a mineral ?

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  12. How do elements generally occur?

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  13. What is meant by minerals and ores ? Are all minerals ores?

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  14. Name the methods used for the concentration of ores.

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  15. What is calcination and roasting ?

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  16. Giving appropriate examples (at least three), explain how the reactivi...

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  17. The choice of a reducing agent in a particular case depends upon therm...

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  18. Name three metals which are obtained by the reduction of their oxides ...

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  19. Which methods would you recommed for the purification of impure metals...

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  20. Distinguish: Slag and flux

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