Question

Sodium thiosulphate is used in photography because of its :

• A. Oxidising behavior
• B. Reducing behavior
• C. Complexing behavior
• D. Photochemical behavior

Answer 1

Answer: (C)

Complexing behavior

Answer 2

Ag+ + 2S2O32– $\longrightarrow$ [Ag(S2O3)2]3– ; soluble complex is formed.