Question

“MgO is used as a refractory.”
Answer whether the above statement is true or false.
If true enter 1, else 0.

Answer 1

Hint: Refractory is a material that is resistant to high temperatures, pressures and most chemicals. It remains in the same form even at very high temperatures. Refractors are inorganic non-metallic materials.

Complete Step-by-Step Solution:
We will know about refractory materials first and then find whether MgO can be used as refractory or not.
- Refractory is a material that is resistant to high temperatures, pressures and most chemicals. It remains in the same form even at very high temperatures.
- Refractories are inorganic non-metallic materials. Generally, they are porous. Most of the refractory materials are oxides of aluminum, magnesium, silicon and calcium.
- Thus, we can say that magnesium oxide (MgO) is a refractory or refractory material.
- Refractory materials are used in kilns, furnaces and different types of reactors.
- Different refractory materials have different characteristics. Zirconia is used as a refractory material when we want to use it in extremely high temperatures. Silicon carbide and Graphite can be used as a refractory material but oxygen should not be there in the environment they are in because they may oxidize and burn.
- MgO can be categorized into basic refractory materials. The other type of refractory materials are acidic and neutral.

Thus, we will enter 1 as the statement is correct.

Note: MgO is also used in the manufacture of Crucibles, cements, heating elements, thermocouple tubes, brake linings, plasma display screens as well. Magnesia cement is also known as sorel cement and it is fast-hardening.