The variation in solubility in water of given alcohol has to be explained.
Like dissolves like principle
Polar solutes dissolved in polar solvent and non polar solutes dissolved in non polar solvent. Example, Methanol and water both are polar molecule. Methanol dissolves in water but Hexane does not dissolve in water because hexane is non polar.
Compounds with same intermolecular force are soluble in one another because solute-solvent interactions are similar signification to the solute-solute interaction.