Question:
Which solution is used to test the presence of starch?
Which solution is used to test the presence of starch?
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A blue-black colour confirms starch; no colour change means no starch.
Updated On: Oct 27, 2025
- Iodine
- Safranin
- Eosin
- Methylene blue
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The Correct Option is A
Solution and Explanation
Step 1: Test.
Iodine solution turns blue-black in presence of starch due to formation of a starch–iodine complex.
Step 2: Others.
Safranin, eosin, and methylene blue are general stains, not specific starch indicators.
Step 3: Conclusion.
Therefore, iodine is used to test starch.
Iodine solution turns blue-black in presence of starch due to formation of a starch–iodine complex.
Step 2: Others.
Safranin, eosin, and methylene blue are general stains, not specific starch indicators.
Step 3: Conclusion.
Therefore, iodine is used to test starch.
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