In chromatography technique, the purification of a compound is independent of:

In chromatography, the separation and purification of compounds depend on several factors: the differential adsorption or partition of the compound between the stationary and mobile phases (which relates to solubility), the flow rate of the solvent system (mobility), and the length of the column or TLC plate (which affects resolution).

However, the physical state of the pure compound (whether it is a solid, liquid, or gas in its pure form) does not directly affect the chromatographic separation process. What matters is how the compound interacts with the stationary and mobile phases in the dissolved state during chromatography, not what physical state the isolated pure compound exists in.

Therefore, the purification in chromatography is independent of the physical state of the pure compound. The correct answer is Option (4).