Question

petroleum is referred as BLACK GOLD? give reasons

Answer 1

hey dear.....!!!!

Petroleum is a thick black liquid. Petroleum and its derivatives are called Black Gold as they are very valuable.

hope it's help you if u like the answer mark as a brain list dear!!!!!
=============

Answer 2

As gold is precious in ones life like wise petroleum is also vry precious and it is black in colour thus it is known as black gold