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Which of the following ore and metal are...

Which of the following ore and metal are correctly matched:

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D
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Which of the following pairs is not correctly matched with respect to the extraction of metals from their ores ?

Minerals from which metals can be extracted economically and easily are called ores.The extraction of metals from theirs ores involves the following processes. (i)Concentration. (ii)Calcination | roasting | leaching . (iii)Reduction. It is carried out be one of the following methods. Which of the following is not correctly matched ?

MOTION-METALLURGY-EXERCISE 3
  1. Which method of purification is represented by the following equation?...

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  2. Mercury is purified by :

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  3. Which of the following ore and metal are correctly matched:

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  4. Which of the following metal is correctly matched with its ore :

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  5. Which of the following employ(s) thermal decomposition of volatile iod...

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  6. The method of zone refining of metals is based on the principle of :

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  7. Railway wagon axles are made by heating rods of iron embedded in charc...

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  8. In the extraction of Cu from its sulphide ore, the metal is formed by ...

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  9. Carnallite on electrolysis gives

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  10. Among the following statements, the incorrect one is

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  11. Match column–I and column–II and select the correct answer using the c...

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  12. Match column–I with column–II and select the correct answer using the ...

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  13. Statement-1:Sulphide ores are concentrated by froth floatation process...

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  14. Statement-1: Platinum and gold occur in native state in nature. Stat...

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  15. Statement-I : Wolframite impurities are separated from cassiterite by ...

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  16. Assertion : In smelting, roasted ore is heated with powdered coke in p...

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  17. Statement-1:Al is used as a reducing agent in aluminothermy. Stateme...

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  18. Assertion : Lead, tin and bismuth are purified by liquation method. ...

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  19. Statement-1: Wolframite impurity is separated from SnO, by magnetic se...

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  20. Ti can be purified by Van Arkel process. TiI(4) is a volatile compou...

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