Question

Which non-metal is used to make fireproof material?
A. Sulphur
B. Mica
C. Asbestos
D. Nitrate

Answer 1

Hint: This non-metal is generally used as building materials and is also one of the best electrical insulators. It is the term used to refer to six naturally occurring silicate minerals.

Complete answer: A term used to refer to six naturally occurring silicate minerals, rock-forming minerals made up of silicate groups is Asbestos.
Asbestos is considered one of the best electrical insulators (a material in which current does not flow freely) and the heat resistance is also high. However, Asbestos is not used as a building material in several countries and is illegal due to the harmful characteristics of the substance. The use of this substance can also lead to several serious diseases such as cancer and asbestosis.
It was also used in the Stone Age to strengthen the ceramic pots, as per the archaeological evidence. During the 20th century, asbestos was widely used to make fireproof materials.

While talking about the other options,
A. In the western countries, sulphur is used in the production of sulphuric acid, it is also used in the vulcanization of black rubber, in industries, it is used to make batteries, gun powder, fireworks, etc.
B. Mica is generally used by the plastic industry as an extender and filler. In electrical industries, Mica is commonly used.
D. Because of the high solubility and biodegradability, nitrate is produced for the use of fertilizers.

Thus the correct option is C.

Note: Most buildings constructed before the 1980s contained asbestos despite knowing the fact that it causes severe diseases. Russia, in 2015 produced one million tonnes of asbestos.