First slide

General methods of extraction of elements from the earth crust

Question

MgO can be used as a refractory material because

Moderate

A

It is a good electrical insulator
B

It is a good conductor of heat
C

It has high melting point
D

It is very soft metal

Solution

A refractory material or refractory is a material that is resistant to decomposition by heat, pressure, or chemical attack and also at High T or P.

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