Question

What is called black gold?
(A) Petroleum
(B) Natural gas
(C) Coal tar
(D) Coal

Answer 1

Hint: It is a naturally occurring liquid found beneath the earth's surface that can be refined into fuel. It's a fossil fuel, which means it has been created by the decomposition of organic matter over millions of years.

Complete step by step solution:
> First let us see what petroleum is.
Petroleum is a fossil fuel, also called crude oil. Similar to coal and natural gas petroleum was formed from the remains of ancient marine organisms, such as plants, algae and bacteria.
> Let us try to understand how petroleum was formed.
Millions of years ago, algae and plants lived in shallow seas. After dying and sinking to the seafloor, the organic material mixed with the other sediments and was buried. Over millions of years under high pressure and high temperature, the remains of these organisms transformed into fossil fuels. Coal, natural gas and petroleum are all fossil fuels that are all fossil fuels that are formed under similar conditions. Petroleum reservoirs can be found beneath land or the ocean floors . Their crude oil is extracted with gaunt drilling machines.
> Petroleum is very costly to extract. Petroleum is very valuable . Crude oil is the virtual backbone of our modern lives. Huge amounts of money and sophisticated equipment are required for bringing out the petroleum from the subsurface. Thus, its value is comparable to gold.
Therefore , Petroleum is called black gold. Option A is your answer.

Note: Black gold is used for petroleum and black diamond is used for coal. Many compounds found in oil are highly toxic and can cause cancer as well as other diseases. Benzene is present in both crude oil and gasoline and is known to cause leukemia in humans.