• # question_answer Which of the following is the weakest acid [BHU 1984, 86; CPMT 1988, 2000; MP PMT 1995; MP PET 1989, 90; Kurukshetra CEE 1998; Roorkee 2000; RPMT 2000] A) $HF$ B) $HCl$ C) $HBr$ D) $HI$

HF is the weakest acid. Since it is unable to give ${{H}^{+}}$ ions which are trapped in H-Bonding.