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Outline the principles involved in the f...

Outline the principles involved in the following methods of refining of metals.
Zone refining.

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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE
  1. List important uses of copper .

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  2. Write down the reactions taking place in different zones in the blast ...

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  3. Outline the principles involved in the following methods of refining o...

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  4. Why is the extraction of copper from pyrites more difficult than that ...

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  5. “Metals are usually not found as nitrates in their ores”. Out of the f...

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  6. Match items of Column I with the items of Column II and assign the cor...

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  7. Which alloy is used to make arms and equipments of machines?

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  8. Which of the following is used in paints?

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  9. 2X+B2H6 rarr [BH2(X)2]^+ [BH4]^- The amine(s) X is/are

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  10. Which of the following reaction is an example of calcination process?

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  11. Fill in the blanks- Methane gas is also known as

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  12. Principle of paper chromatography is based on

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  13. Magnetic separation method is basically used for-

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  14. Give two uses of methane gas?

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  15. is a mixture of solution of copper sulphate and lime which is used as ...

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  16. Heating mixture of Cu2O and Cu2S will give :

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  17. In view of the sign of Deltar G^@ for the following reactions : PbO2 +...

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  18. State whether the statement is true or false- Baking powder is used to...

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  19. In the context of the Hall-Heroult process for the extraction of Al, ...

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  20. Which one of the following ore is best concentrated by froth floatatio...

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