8. A green leaf is bleached before carrying out a starch test. Why?
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17
Answer:
Chlorophyll is a green pigment and so masks the colour change of the iodine test for starch. Chlorophyll needs to be removed from the leaf i.e. the leaf needs to be ' decolourized' for changes to be observed. A decolourized leaf is pale yellow or green.
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1
Answer:
photosynthesis is the answer
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