Question

All the components of the mixture do not rise all the way to the upper end of the filter paper, but remain behind at different height. why?​

Answer 1

The method works because of the differences in the ways various components of a mixture are absorbed and redissolved from a piece of ...

Answer 2

All the components of a mixture possess different physical properties.

For example, density, viscosity, volatility, solubility, behavior toward magnet, etc.  

Because of different physical properties of the components they remain separated from each other and maintain different height behind.

The mixture is prepared with all types of contains but they don’t get blended with each other chemically and stay separate from each other.