Question

Choose the correct answer from the four alternatives given in the brackets:
What is called as black gold?
(Hydrocarbons, Coal, Petroleum, Ether)

Answer 1

Petroleum has been nicknamed as the black gold. The reasons for petroleum being called so are:

1) Petroleum is scarce and hard to find in the Earth’s surface.

2) Petroleum is very costly to extract.

3) Petroleum is very valuable.