Question

1.
Define the following terms.
(i) Mineral
(ii) Ore
(iii) Gangue
Name two metals which are found in nature in the free state.
What chemical process is used for obtaining a metal from its oxide?
2.
3.​

Answer 1

1. a solid, naturally occurring inorganic substance.
2. a naturally occurring solid material from which a metal or valuable mineral can be extracted profitably.
3. the commercially valueless material in which ore is found.

4.Name two metals which are found in nature in the free state. Answer: Silver and Gold. Since silver and gold are least reactive, so these are found in free state.

5.The chemical process used for obtaining a metal from its oxide is reduction. In this process, metal oxides are reduced by using suitable reducing agents such as carbon or by highly reactive metals to displace the metals from their oxides.

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