Science, asked by ibu22, 3 months ago

: To test a leaf for starch
​

Answers

Answered by studystaar
0

Answer:

we can test the presence of starch in leaf with iodine

Answered by mohammedjawaad
0

Answer:

heat a plant leaf in boiling water for 30 seconds (this kills the leaf, stopping any chemical reactions)

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 and spread onto a white tile

add iodine solution from a dropping pipette

After a few minutes, the parts of the leaf that contain starch turn the iodine from brown to blue/black.

Hope it helps you have a nice day.

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