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In the purification of aluminium by Hooper's process, impurities of silicon and copper are added to molten aluminium in order to:

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make the melt heavier

smooth deposit of aluminium

make the melt conducting

lower the melting point of the melt

answer is D.

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Detailed Solution

In Hooper's purification process, molten aluminum is mixed with silicon and copper impurities to make the melt heavier.

Hence Correct option is D

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