Which property of ${\rm{N}}{{\rm{a}}_2}{{\rm{S}}_2}{{\rm{O}}_3}$ makes it useful in photography?

NEET UG CHEMISTRY MCQ: S-BLOCK ELEMENTS

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Which property of

\mathrm{N}{\mathrm{a}_2}{\mathrm{S}_2}{\mathrm{O}_3}

makes it useful in photography?

View answer and explanation

Correct option: B

Complex formation property

Option B is correct because sodium thiosulphate forms soluble complexes with silver halides, which is why it is used as a fixing agent in photography to remove unexposed silver bromide from the film.

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