An aqueous solution of 'X' is added slowly to an aqueous solution of 'Y' as shown in List I. The var — Electrochemistry Chemistry Question

💡 Solution & Explanation

(A) A weak base added to a weak acid forms a salt (strong electrolyte), so conductivity increases. After equivalence, adding more weak base doesn't increase ions significantly, so it stabilizes. (B) Adding KI to AgNO3 substitutes Ag+ with K+ (similar mobility), so conductivity stays practically constant. After all Ag+ is precipitated, excess KI adds K+ and I- ions, increasing conductivity. (C) Adding weak acid to a strong base replaces highly mobile OH- with slower CH3COO-, decreasing conductivity. After equivalence, adding weak acid adds few ions, so it stabilizes. (D) Adding strong base to strong acid replaces highly mobile H+ with slower Na+, decreasing conductivity. After equivalence, excess strong base adds mobile OH-, increasing conductivity. Therefore, correct answer is A-R; B-S; C-Q; D-P.