You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Gunshot residue on hands can he detected by which test- and explain in detail?
Ans. is 'c' i.e., Dermal nitrate test o Dermal nitrate/ paraffin/diphenylamine test:It is used to detect firearm residues on the hands of the suspectIn this, the hands are coated with a layer of liquid paraffin. After cooling, the casts are removed & treated with an acid solution of diphenvlamine, a reagent used to detect nitrates & nitrites that originate from gunpowder & is deposited on the skin of the person who has fired the shot.A positive test is indicated by the presence of blue flakes in the paraffin.o Benzidine test- most sensitive test for detection of blood,o Phenolphthalein / Kastle Mayer test-screening test for blood stainso Harrison & Gilroy test hydrogen activation analysis- is used to detect heavy metal. These heavy metals are detected from entrance wound where they are components of the residue discharged from the cartridge of a firearm weapon.