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Basic Chemistry

Question

Sodium thiosulphate ($$Na_2S_2O_3$$) solution is used in photography to_____________.

A

remove reduced silver

B

convert the Metallic silver to silver salt

C

reduce silver bromide $$(AgBr)$$ grain to silver

D

remove undecomposed $$AgBr$$ as a soluble silver thiosulphate complex

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Solution

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Correct option is C. remove undecomposed $$AgBr$$ as a soluble silver thiosulphate complex

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