Question

7. Distinguish between the following:
(i) Electrolytic reduction and electrolytic refining.
(ii) Mineral and ore.
(ii) Alloys and amalgams.​

Answer 1

Answer :

(i) Electrolytic reduction & electrolytic refining:

• Electrolytic reduction : It is a process of obtaining metals from their molten chlorides or molten oxides by electrolysis. The metals are deposited at the cathode whereas chlorine or oxygen is liberated at anode.

• Electrolytic refining : It is a process of refining impure metals obtained by any of the reduction process. The impure metal is taken as anode, pure metal as cathode and metal salt solution as electrolyte.

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(ii) Mineral & ore:

• Mineral : The elements or compounds which occur naturally in the earth's crust.

• Ores : They are the minerals from which metals can be extracted profitably.

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(iii) Alloys & amalgams:

• Alloy : A homogeneous mixture of two or more metals or a metal and a non-metal.

• Amalgam : It is an alloy in which one of the metals is mercury.