Q. Sodium thiosulphate is used in photography
A) As $AgBr$ grain is reduced to non-metallic silver
B) To convert metallic silver into silver salt
C) To remove reduced silver
D) To remove undecomposed $AgBr$ in the form of ${Na}_{3}\left\lbrack Ag\left( S_{2}O_{3} \right)_{2} \right\rbrack$ (a complex salt)
Explanation
The correct answer is Option D: To remove undecomposed $AgBr$ in the form of ${Na}_{3}\left\lbrack Ag\left( S_{2}O_{3} \right)_{2} \right\rbrack$ (a complex salt).
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.