Question

1. Petroleum is called as :
(a) black gold
(b) rock oil
(c) both (a) and (b)
(d) none of these​

Answer 1

Answer:

a black gold is known as petroleum

Answer 2

Answer:

The name petroleum means rock oil.It is called petroleum because it is found under the crust of earth trapped in rocks. i think both because it is also known as black gold