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:

  1. (c) Undecomposed AgBr forms a soluble complex with hypo

AgBr+2Na2S2O3Na3[Ag(S2O3)2]+NaBr

 soluble complex 



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