A) Reduce silver bromide to metallic silver
B) Convert metallic silver to silver salt
C) Remove undecomposed \[AgBr\]as a soluble silver thisulphate complex
D) Remove unreduced silver
Correct Answer: C
Solution :
\[AgBr+2N{{a}_{2}}{{S}_{2}}{{O}_{3}}\to N{{a}_{3}}[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}]+NaBr\]
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