Question

When we mix oil in a glass of water, two things happen:

1) The oil does not mix with water.

2) It settles on top of water making a separate layer.

What is the reason for these two phenomena? Mention the property being exhibited by the oil. [3 MARKS]

Answer 1

Explanation: 1 Mark each
Property name: 1 Mark

1. The oil does not mix with water which means that it is insoluble in water. Things which are soluble in water mix with it and disappear.
2. It settles on the top of the water which shows that it can float on water. Generally, materials float on water if their density is less than that of water so certainly the density of the oil was less than that of water.
3. The oil here is exhibiting insolubility.