GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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sodium oxalate
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sodium sulphite
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sodium sulphate
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sodium thiosulphate
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Detailed explanation-1: -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: -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.
Detailed explanation-3: -Sodium sulphite is also used in water treatment and photography. Inorganic sulphites and (such as sodium sulphite, Na2O3S) are used in photography, the bleaching of wool, and as preservatives in foods, beverages, and medications. They act as effective antioxidant compounds.