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    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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