A) in developing photographic films
B) for making printing inks
C) for making perfumes
D) as bleaching agent
Correct Answer: A
Solution :
Hypo \[\text{(N}{{\text{a}}_{2}}{{\text{S}}_{2}}{{\text{O}}_{3}}\text{.5}{{\text{H}}_{2}}\text{O)}\] or sodium thiosulphate is used for fixing negative by complex formation.
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