The solution remaining after the formation of crystals is called

Explanation

The solution remaining after the formation of crystals is called Mother liquor (Option A):Mother liquor refers to the solution that remains after the crystallization process has occurred and crystals have formed. It contains the excess solute that didn't crystallize out and remains in the liquid phase.Why the other options are incorrect:(c) Residue: Residue typically refers to the solid material left behind after a process. In the context of crystallization, residue might refer to any undissolved impurities or insoluble components that don't form crystals but remain as solid residue.(b) Dilute solution: Dilute solution implies a solution with a relatively low concentration of solute compared to the solvent. The term doesn't specifically refer to the solution remaining after crystallization.(a) Filtrate, residue: The term "filtrate" usually refers to the liquid collected after filtration, containing the dissolved components that pass through the filter paper. It's not the solution remaining after crystallization.