Question
Download Solution PDFWhich of the following is used in photography?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Sodium thiosulphate.
Key Points
- Sodium thiosulfate
- 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 remains unchanged by exposure to light.
Additional Information
- Sodium bicarbonate
- Baking Soda is the common name for Sodium Bicarbonate.
- Its chemical formula is NaHCO3.
- It is a crystalline white solid that is salty and alkaline.
- It is used for cooking purpose, pest control, and as a fire extinguisher.
- Sodium hydroxide
- Sodium hydroxide (NaOH) is known as 'caustic soda' and it is a 'high-base' alkali.
- It is used in the manufacture of pulp and paper cloth, drinking water, soap, and detergent.
- In the field of medicine, sodium hydroxide is used for the treatment, control, prevention, and improvement of diseases.
- Sodium benzoate is used as a preservative for carbonated drinks, jams and fruit juices, and pickles.
- Sodium sulfate
- The formula for sodium is – Na+, and Sulphate is – SO42-. So, the formula for Sodium Sulphate is – Na2SO4.
- Sodium sulfate is used to dry organic liquids.
- As a filler in powdered home laundry detergents.
- Na2SO4 is used in manufactured paper, glass, dyes, and pharmaceuticals.
- It is often used in its decahydrate form, which is also known as Glauber's salt.
- It is also called salt cake.
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