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The function of fluorspar in the electrolytic reduction of alumina dissolved in fused cryolite is:
(a)as a catalyst.
(b)to lower the temperature of the melt and improve the conductivity of cell.
(c)to decrease the rate of oxidation of carbon at the anode.
(d)to decrease the rate of oxidation of carbon at the
cathode.
cathode.

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Important Questions on General Principles and Processes of Isolation of Elements
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Copper matte is extracted from copper pyrites ore by heating it in blast furnace. The method is based on the principle that:

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If red bauxite contains chief impurity of ferric oxide but contains some amount of is subjected to Baeyer's process, then select the correct reason for

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In the extraction of copper from its sulphide ore, the metal is formed by the reduction of with

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In the metallurgy of aluminium __________.

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Which of the following diagrams is correctly related to different steps involved in the extraction of from zinc blende ore?

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IMPORTANT
Which of the following diagrams is correctly related to refining of gold?

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Which of the following reactions is/are the main reaction during partial roasting of chalcopyrite in a blast furnace?
