Foods with starch in them will turn blue- black when they come in contact with ___________.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. iodine
Foods containing starch will turn blue-black when they come in contact with iodine solution.
- Iodine forms a complex with starch molecules, resulting in a characteristic color change from yellow-brown (the color of iodine solution) to blue-black.
- This reaction occurs due to the formation of a starch-iodine complex, where iodine molecules fit into the helical structure of the starch molecules.