Question

why are petroleum and it's derivatives called black gold​

Answer 1

Answer:

that's reason is the

Explanation:

for example gold is the very low amount in our earth's crust and very costly metal.

then petroleum is very useful for daily life obviously you are all know amount of petroleum is day by day decreases this reason petroleum is known as black god because in next few days prize of petroleum is increased.

Answer 2

Answer:

it is bcz when crude oil is extracted from land it is black in colour bt due to its advantages and valuable properties it is know as black gold and also after the purification of black crude oil it or turned into golden colour