Give reasons for the following:Addition of Cl_2 to KI solution gives i – InterviewSolution

1.	Give reasons for the following:Addition of Cl_2 to KI solution gives it a brown colour, but excess of Cl_2 turns it colourless.
Answer» Solution :Brown colour is FORMED due to EVOLUTION of `I_2`. EXCESS of `Cl_2` REACTS with`I_2`to form colourless `ICl_3`. `Cl_2 + 2KI to 2KCl + I_2` ( brown ) `3Cl_2 + I_2 to 2ICl_3 ` ( colourless)

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