A leaf was plucked from a plant on a sunny day and kept for 2 minutes in boiling water. It was subsequently immersed in boiling alcohol and treated with iodine solution. What will be the final colour of the leaf after the test?
- A. Colourless
- B. Green
- C. Blue ✓
- D. White
Correct Answer: C. Blue
Explanation
Boiling the leaf in alcohol removes chlorophyll. When treated with an iodine solution, the starch produced during photosynthesis reacts to give a blue-black colour.
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