Which acid does not show coagulation necrosis on contact?
(A) HC1 (B) H,SO4 (C) HF (D) HNO3
(C) Ans: C. HF(Ref Reddy 34/e p493, 33/e p530; Principles of Clinical Toxicology 3/e p220; Forensic Pathology 3/ep241, 110).HF does not show coagulation necrosis on contact.Hydrofluoric acid causes liquefaction necrosis.