A) remove reduced silver
B) remove unrecompensed \[AgBr\]as soluble silver thiosulphate complex
C) convert the metallic silver to silver salt
D) reduce the silver bromide grains to metallic silver
Correct Answer: B
Solution :
\[2N{{a}_{2}}{{S}_{2}}{{O}_{3}}\,+\underset{Un\,\,\exp osed}{\mathop{AgBr}}\,\,\xrightarrow{\,}\,\,N{{a}_{3}}\] \[\,[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}]+NaBr\] This property is used for fixing in photography.
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