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Sodium thiosulphate (Na(2)S(2)O(3).5H(2)...

Sodium thiosulphate `(Na_(2)S_(2)O_(3).5H_(2)O)` is used in photography to

A

Dissolving out unreacted silver bromide

B

Converting silver halides to metallic silver

C

Reducing solubility of AgBr

D

Preventing overdeveloping and fogging

Text Solution

Verified by Experts

The correct Answer is:
A
Sodium thiosulphate dissolved the undecomposed or unreacted AgBr. As such it fixes the image.
`AgBr (aq) +2Na_2S_2O_3 (aq) to Na_3[Ag(S_2O_3)_2](aq) + NaBr(aq)`
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