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Q. |
The chemical used as a fixer in photography is - |
A. | sodium thiosulphate |
B. | sodium sulphate |
C. | borax |
D. | ammonium sulphate |
Answer» A. sodium thiosulphate | |
Explanation: 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. |
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