MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

According to the Hardy-Schulze rule, the coagulating power of an ion is directly proportional to the magnitude of its charge (valency). For the coagulation of a positive sol, an anion is required. The given anions and their charge magnitudes are: Cl ^- : 1 SO _4^ 2- : 2 PO _4^ 3- (given as PO _4^ 2- in options) : 3 [ Fe(CN) _6]^ 4- : 4 Since [ Fe(CN) _6]^ 4- has the highest negative charge, it possesses the maximum coagulating power among the given options.