The P Block Elements - Result Question 59
####61. Hypo is used in photography to
[1988]
(a) reduce $AgBr$ grains to metallic silver
(b) convert metallic silver to silver salt
(c) remove undecomposed silver bromide as a soluble complex
(d) remove reduced silver
Topic 3: Halogen Family
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Solution:
- (c) Undecomposed $AgBr$ forms a soluble complex with hypo
$ AgBr+2 Na_2 S_2 O_3 \to Na_3[Ag(S_2 O_3)_2]+NaBr $
$ \text{ soluble complex } $
