Question

Solubility of iodine in water may be increased by adding:

• A. chloroform
• B. potassium iodide
• C. carbon disulphide
• D. sodium thiosulphate

Answer 1

Answer: (B)

The solubility of $I_2$ in water increases by the addition of KI due to formation of polyhalide ion, i.e., $I_3^{-}$.
$KI+I_2⟶K{I}_3$