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  • Question 1
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    The method used for the concentration of sulphide ores is:

  • Question 2
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    Cinnabar $$(HgS)$$ is heated in air, it is first converted into ________ which is then reduced to _______ on further heating.

  • Question 3
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    During electrolytic refining of Alumina, the molten electrolyte used contains _______ .

  • Question 4
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    During electrolytic reduction of alumina, ___________.

  • Question 5
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    Mercury has low boiling point. Therefore it can be purified by the process of:

  • Question 6
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    During calcination:

  • Question 7
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    The process of zone refining is used in the purification of :

  • Question 8
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    Metal oxide can be reduced by __________.

  • Question 9
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    The ore that is concentrated by the froth floatation process is:

  • Question 10
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    Aluminium powder is used in thermite welding because :

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