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Question
When food rich in starch is treated with iodine, it turns into _____.
Options:
A .  blue-black colour 
B .  orange colour 
C .  red colour
D .  pink colour 
Answer: Option A
:
A
Using iodine to test for the presence of starch is a common experiment. Solution of iodine (I2) and potassium iodide (KI) in water has a light orange-brown colour. If it is added to a sample that contains starch, such as the bread pictured, the colour changes to a deep blue.
When Food Rich In Starch Is Treated With Iodine, It Turns In...

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