How will you separate water and petrol from their mixture?
Water and petrol do not mix with each other. When petrol is added into water, it forms a separate layer. So, in the mixture of petrol and water, two different layers get formed i.e., one of petrol and other of water. The density of petrol is lighter than that of water, so it forms the upper layer from where it can easily be separated by using a distillation method.