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In photography , `Na_(2)S_(2)O_(3).5H_(2)O` is used
A. in reduction of Ag metal from AgBr
B. for the conversion of AgBr into silver thiosulphate
C. for the conversion of AgBr into silver sulphate
D. for the conversion of AgBr into soluble thiosulphate complex.

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1 Answers

`AgBr+2Na_(2)S_(2)O_(3)rarrNa_(3)[Ag(S_(2)O_(3))_(2)]+NaBr`
soluble complex

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