Question

다 S S 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. ghcjj​

Answer 1

Answer:

(i) Mineral : It is a solid , naturally occurring inorganic substance.

(ii) Ore : It is a naturally occurring solid material .

(iii) Gangue : rock or mineral matter of no value occurring with the metallic ore in a vein or deposit.

Gold and Silver are the examples of metals which are found in nature in the free state.

Reduction method is the process used to obtain metal from its oxide.

Explanation:

(i) Mineral : It is a solid chemical compound with well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.

(ii)Ore :It is a metal-bearing mineral or rock, or a native metal, that can be mined at a profit.

(iii)Gangue : It is the unwanted material or impurities in the form of sand, rock or any other material that surrounds the mineral in an ore deposit.

• Gold and Silver are the least reactive metals found in free state in nature.
• Reduction : metallic oxide is reduced to metal during the extraction of metals.

Answer 2

Answer:

(1) mineral - the elements are compounds which found naturally in the earth crust are called minerals

(2)ore-at some places minerals contain a very high percentage of a particular metal and the metal can be profitable extracted from it this minerals are called ores example cinnabar is an ore of Mercury

(3) gangue-the impurities such as sand soil Graval etc present in the ore are called gangue