Question

Certain metallurgical processes for the extraction of a particular metal are mentioned below. Arrange them in proper order.

(A) Gravity separation

(B) Smelting

(C) Pulverization

(D) Distillation

(E) Roasting

• A. ACEBD
• B. CEADB
• C. AECDB
• D. CAEDB

Answer 1

The correct option is D

CAEDB

Explanation of correct option:

1. Pulverization: The big lumps of ore that are taken out from the earth’s crust are broken into a smaller fine powder, this process of crushing the lumps of ore into a fine powder is called pulverization.
2. Gravity separation: Gravity separation is used for concentrating ore on the basis of the specific gravities of the ore and gangue particles. This method is used to separate lighter gangue particles from the heavier ore.
3. Roasting: Roasting is a process in which the concentrated ore is strongly heated in the excess supply of air below its melting point. This process is generally used to convert sulphide ores into metallic oxides.
4. Smelting: Smelting is a technique to extract base metals from their ores with the help of heat and a chemical reducing agent.
5. Distillation: This method is used to distill metals that make vapours easily. Distillation is a process where the impure metal is heated in a vessel and the metal forms vapours which are condensed separately in a receiver.

Therefore, the correct order is CAEBD.

Hence, the correct option is (D).