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add the leaf to boiling ethanol in a water bath for a few minutes (the boiling ethanol dissolves the chlorophyll and removes the green colour from the leaf - it turns white so it is easy to see the change in colour) wash with water to rehydrate and soften the leaf
Mr Answers
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∙ 12y agoleaf is boiled in alcohol so that the green pigment that's chlorophyll is removed which lightens the green colour of the leaf.see the lab manual of class 10 (NCERT) u have this experiment in it.
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∙ 12y agoIt is boiled in ethanol so it can remove the chlorophyll.
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∙ 10y agoSo then the ethanol could extract the chlorophyll from the leaf
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∙ 13y agobecause the chlorophyll is green and it stained the etanol
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When a leaf becomes crispy after being boiled in ethanol how do you remove it?
by immersing it in a hot water bath
What will happen to the boiling leaf when in ethanol what will happen to the leaf and the ethanol?
the ethanol will change colour and the leaf will soften
When white light shines on a green leaf why do you see green?
our eyes detect the green light that is reflected off the leaf
A leaf was taken from a plant boiled with ethanol and tested with iodine solution what is it tested for?
Starch, I think, because iodine solution is the test for starch.
What was the colour the clear alcohol become once the leaf is boiled in it?
what colour does the clear alcohol become once the leaf is boiled in it
What happens when you soak green leaves in ethanol?
Ethanol extracts chlorophyll from leaf .
Why did leaf had to be boiled in ethanol when testing leaf for starch?
Ethanol dissolves chlorophyll hence further phtosynthetic activity is stopped in the abscence of light and the leaf becomes transparent (colorless). the colorless leaf takes better stain with iodene while testing for the presence of starch.
When a leaf becomes crispy after being boiled in ethanol how do you remove it?
by immersing it in a hot water bath
What happens when green leaf is boiled in water?
it will make holes
If a green leaf is boiled in water?
The cells all burst and the leaf looses turgidity = the leaf dies
When testing a leaf for starch why is it rinsed in cold water after it is boiled?
After the leaf has been placed in ethanol it becomes very brittle. It is then rinsed in cold water so as to soften it and makes it more manageable for the addition of iodine.
What will happen to the boiling leaf when in ethanol what will happen to the leaf and the ethanol?
the ethanol will change colour and the leaf will soften
Why does leaf turn blue black when boiled in ethanol first then iodine?
Boiling in ethanol strips the leaf's waxy outer coating off, then the iodine turns it blue black because it's reacting to the presence of starch, a product of photosynthesis.
When white light shines on a green leaf why do you see green?
our eyes detect the green light that is reflected off the leaf
When light strikes a green leaf how does this explain why leaves appear green?
Light that is white contains all the colours. When the light hits the leaf, it absorbs all the colours apart from the green light which is reflected back out to your eyes. So you see the leaf as green.
A leaf was taken from a plant boiled with ethanol and tested with iodine solution what is it tested for?
Starch, I think, because iodine solution is the test for starch.
Why does leaf appear green?
it reflects green light
