name the chemical solution that changes it's colour to blue black in the presence of starch
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name the chemical solution that changes it's colour to blue black in the presence of starch
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Starch changes colour and turns blue-black in solution. Iodine present in the aqueous Potassium iodide solution gets entangled in the starch and forms starch Iodide complex. Hence starch turns blue-black or purple-black in colour.