What is the name of the solution that is employed to identify the existence of starch in food?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Iodine solution .
To test for the presence of starch in food, an iodine solution is used. When iodine is added to a substance containing starch, it reacts with the starch molecules and produces a blue-black color. This color change is a clear indicator of starch. The test is simple, quick, and widely used in both educational and laboratory settings. Common food items like potatoes, rice, or bread will show this color change due to their high starch content. If no starch is present, the iodine remains a yellow-brown color. This test is a standard method in food science and biology.
Other Options:
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Copper sulphate solution: Used in the Benedict’s or Biuret test to detect reducing sugars or proteins, not starch.
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Ammonium chloride: A salt used in various applications like fertilizers, but not for food testing.
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Chlorine solution: A disinfectant and bleaching agent; it doesn't react with starch for identification.