See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

2 x y x H A H HA ; y is very less so x + y x        1 2 a x K c x    2 2 12 a a at equilibrium C-X x+y x-y K y 10 ;pK 12     AITS-FT-II (Paper-2)-PCM(Sol.)-JEE(Advanced)/2021 FIITJEE Ltd., FIITJEE House, 29-A, Kalu Sarai, Sarvapriya Vihar, New Delhi -110016, Ph 46106000, 26569493, Fax 26513942 website: www.fiitjee.com 10 1 2 HA H A      2 1 a a at equilibrium x-y x+y y pK pK 12 5 7     1 a 1 pH [pK logc] 2   1 1 a a 1 3 [pK 1] pK 5 2   