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26. The diagram below illustrates iodine test for the presence of starch in a leaf.V. ThshXics((re29. (a) CatBOLNO NATERBOL IN METHYLATED SPIRIT(BOIL IN HOTWATER)(DIP IN IODINE (BLUE BLACKSOLUTION) COLOUREDLEAF)(a) Why is the leaf boiled in water for few minutes ?(b) Why will the colour of leaf after boiling it withmethylated spirit turns pale white ?(c) Why is the leaf again boiled in hot water ?(d) What is the composition of iodine solution in100 mL of water ? |
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