Question

What is known as Black Diamond?
(A) Gold
(B) Silver
(C) Coal
(D) Iron

Answer 1

Hint Coal is a fossil fuel which is used as domestic fuel as well as industrial fuel. Thermal Power Plants require coal for their operation. Coal is also known as black diamond because it is as valuable as diamond.

Complete step by step answer
Coal is the basic raw material for power plants. Thermal power plants need coal for combustion and the energy released is further used for generating the electric power.
Coal is a fossil fuel. Coal is formed due to dead decaying organic matter which was buried inside the earth’s surface in various layers for millions of years ago.
Coal is of four types.
1. Anthracite
2. Bituminous
3. Lignite
4. Peat
Anthracite is the best quality coal and Peat is the worst quality coal.
India is also a producer of coal. In India Bituminous coals are found in large amounts in the regions of Jharia, Chhota Nagpur Plateau and Chhattisgarh region. India imports Anthracite coal from other countries.
Coal is as valuable as diamond for the power Industries so it is commonly known as the Black Diamond.

Therefore, coal is known as black diamond and the correct option is C.

Note
Coal is known as Black diamond because coal is a basic need in India for the thermal power plants. The thermal power plants produce more than half of the energy requirement of India. Coal is also used as domestic fuel but the main use of coal in thermal power industries.