Question

It is observed that a drop of olive oil in a mixture of alchohol and water floats inside the mixture. WHY?

Answer 1

Density of alcohol is around 0.789 g/cm³

Density of water is we know 1 g/cm³

Density of olive oil is around 0.918 g/cm³

When alcohol and water is mixed the density of the mixture is almost same as the density of olive oil. So, the drop of olive oil floats inside the mixture.