Explanation:
Chromatography is defined as technique for separating a mixture of chemicals which can be present in a liquid or gaseous phase.
These chemical components are separated with the help of a stationary medium on which these components travel at a different rates.
The stationary phase could be a TLC plate or silica gel. And, the mobile phase includes the solvent.
For example, in the given situation ink is our mobile phase. Since, some of the components of ink are soluble into the solvent.
Therefore, ink components will travel will the solvent to the top.
Thus, we can conclude that at the top these components located on the filter paper during chromatography.
