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प्रश्न
What do you observe when Cl2 is passed through potassium iodide (KI) solution.
उत्तर
If in the solution of KI (Potassium iodide), we pass Chlorine gas (Cl2), then Chlorine will displace iodine from KI, and form Potassium Chloride (KCl), and liberates iodine,
\[\ce{Cl2 (aq) + 2 KI(aq) → 2 KCl (aq) + I2 (aq)}\]
When Iodine gas is passed into starch solution the solution becomes blue-black in colour.
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