In a laboratory experiment, when an unknown compound was added to a test tube containing iodine, the color of the tube became intense blue. What could be the unknown compound?
Correct answer: D. Starch
- A. Cellulose
- B. Raffinose
- C. Ribose
- D. Starch
Explanation
The intense blue color formed when an unknown compound is added to iodine indicates the formation of a starch-iodine complex. Starch is known to give this characteristic blue color with iodine due to the formation of a helical inclusion complex.
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