Question

Why do leaves become colourless boiling in spirit

Answer 1

Answer:

When we boil the leaves in spirit they become colorless because chlorophyll pigments leach out. Leaves contain starch which gives blue-black color with iodine solution. Starch is synthesized in the green leaves in the presence of sunlight by the process of photosynthesis.

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Answer 2

Answer: because of alcohol

Explanation:

When we boil the leaves in spirit they become colourless because chlorophyll pigments leach out. Leaves contain starch which gives blue-black colour with iodine solution. Starch is synthesised in the green leaves in the presence of sunlight by the process of photosynthesis.

We boil the leaf in alcohol when we are testing it for starch because to remove the green pigment chlorophyll present in it. For the starch test we need to observe the color change from brown to blue when iodine is put on the leaf. But, initially the leaf is green in color which does not show the required observation. Hence to remove the green pigment present in the leaf we boil the leaf in alcohol when we are testing it for starch.We boil the leaf in alcohol when we are testing it for starch because to remove the green pigment chlorophyll present in it. ... Hence to remove the green pigment present in the leaf we boil the leaf in alcohol when we are testing it for starch.

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