<prompt> Caustic poison erodes mucosa because -Glue like actionHygroscopic in natureHigh affinity for mucosaBeing programmed to stick  <response>: caustic soda is sodium hydroxide In concentrated form, alkali acts as corrosive and in dilute form they act as irritant strong alkalis absorbs water from tissues and precipitates protein Strong alkali produces liquefaction necrosis and causes saponification of fats and dissolves proteins thus causing deep penetration in the tissue resulting in extensive tissue destruction REF;THE SYNOPSIS OF FORENSIC MEDICINE:KS NARAYANA REDDY;28th EDITION;PAGE NO302 