solution (side X) on reaction with (side Y) in aqueous solution gives blue colour. These are separat — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

A semipermeable membrane only allows the flow of solvent molecules (water). The solute ions ($\text{Fe}^{3+}$ and $[\text{Fe(CN)}_6]^{4-}$) cannot cross the membrane, so they will not mix and undergo the chemical reaction to form Prussian blue. Therefore, correct answer is D.