Question

Petroleum occurs deep inside the earth floating over water. Which property of petroleum to form a separate layer over water

Answer 1

Yes the petroleum occurs deep inside the earth but yet it floats on water because the density of the petroleum is less than the water therefore it floats in water.

Answer 2

Petroleum occurs deep inside the earth floating over water. It forms a seperate layer over water because of its two property-

1st. Its density is less than water

2nd. It is insoluble