The chemical used as a fixer in photography is__________?
Correct answer: C. Sodium thiosulphate
- A. Sodium sulphate
- B. Borax
- C. Sodium thiosulphate
- D. Ammonium sulphate
Explanation
Sodium thiosulphate dissolves unexposed silver halides from photographic film, so it is called the photographic fixer. It is also known as hypo.
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