<prompt> False about the toxicity of this poison is:Severe pain on contact is the characteristic featureCauses Liquefactive necrosisCauses Decalcification and destruction of boneResult in hypercalcemia  <response>: Hydrofluoric acid burns result in severe progressive tissue and bone destruction, and excruciating pain. Liquefactive necrosis Decalcification and destruction of bone. Production of insoluble salts--calcium and magnesium fluoride. These effects result in hypocalcaemia and hypomagnesaemia. 