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Question
Observe the given diagram and answer the following questions:
What will you observe when you test the exposed leaf with iodine solution?
[1 Mark]
Observe the given diagram and answer the following questions:
What will you observe when you test the exposed leaf with iodine solution?
[1 Mark]
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Solution
The correct option is B Colour of the leaf will change to blue-black
Leaf exposed to the atmosphere changes to blue-black when treated with iodine solution. This shows that starch is present in the green part of the leaf. On the other hand, the part of the leaf inside the flask does not turn into a blue-black colour on the iodine test. This is because the part of the leaf inside the flask cannot produce starch in the absence of CO2.
Leaf exposed to the atmosphere changes to blue-black when treated with iodine solution. This shows that starch is present in the green part of the leaf. On the other hand, the part of the leaf inside the flask does not turn into a blue-black colour on the iodine test. This is because the part of the leaf inside the flask cannot produce starch in the absence of CO2.
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