GENERAL KNOWLEDGE

Detailed explanation-1: -The answer is Sodium thiosulphate. Sodium thiosulfate (sodium hyposulfite), Na2S2O3, is used by photographers to fix developed negatives and prints. It acts by dissolving the part of the silver salts coated onto film which remain unchanged by exposure to light.

Detailed explanation-2: -Fixation is commonly achieved by treating the film or paper with a solution of thiosulfate salt. Popular salts are sodium thiosulfate-commonly called hypo-and ammonium thiosulfate-commonly used in modern rapid fixer formulae.

Detailed explanation-3: -Sodium Thiosulphate is mostly used as a fixer in photography because of its ability to complex nature. Complete step by step answer: $AgBr$ emulsions are used in photography for the development of films. Since, Silver Bromide is photosensitive, which means it undergoes a chemical reaction which light falls on it.

Detailed explanation-4: -Sodium Thiosulphate Pentahydrate is the raw chemical you need for a “Hypo” fixer solution. Fixer will dissolve any unexposed silver halides. You can use this fix for both film and photographic paper.

Detailed explanation-5: -Sodium thiosulfate (STS) is an industrial chemical which also has a long medical history. It was originally used as an intravenous medication for metal poisoning. It has since been approved for the treatment of certain rare medical conditions. These include cyanide poisoning, calciphylaxis, and cisplatin toxicity.