(a)iodine dissolves more in `KI` solution than in water. Why?
(b) Colour of `KI` solution containing starch turns deep blue when chlorine water is added. Explain.

Explanation

Chlorine placed below iodine in electrochemical series having more reduction potential and thus shows reduction whereas `I^(-)` undergoes oxidation. The `I_(2)` so formed get absorbed in starch to given bluw colour.
`2I^(-) rarr I_(2) +2e^(-)`
`(CI_(2)+2e^(-)rarr2CI^(-))/(CI_(2)+2I^(-)rarrI_(2)+2CI^(-))`