Question

What will be the colour reaction with iodine of a plant kept in dark for few days?

A White Correct Answer Incorrect Answer
B Deep blue Correct Answer Incorrect Answer
C Yellow or brown Correct Answer Incorrect Answer
D Green Correct Answer Incorrect Answer

Solution

If a plant is kept in the dark, it will not photosynthesize and starch cannot be produced, so the iodine test for starch will turn yellow or brown instead of deep blue.

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