Question

Each of these solution is added to a mixture of aqueous solutions of iodide and chloroform $\left(CHC{l}_3\right)$, separately. Which will give a positive test for iodine when the solutions are vigorously mixed?

• A. NaCI solution
• B. NaBr solution
• C. chlorine water
• D. bromine water

Answer 1

Answer: (C), (D)

The correct options are
C chlorine water
D bromine water

Chlorine water and bromine water when added to a mixture of aqueous solutions of iodide and chloroform,free iodine gas of purple/violet colour is liberated.
$2I^{-}+C{l}_2\to I_2\uparrow \left(purple/violet\right)$
$2I^{-}+B{r}_2\to I_2\uparrow \left(purple/violet\right)$