Photosynthesis is the process in which green plants (primarily) convert energy from the sun’s light into usable, chemical energy. Starch is a white and powdery substance. It houses glucose, which plants use for food. The presence of starch in a leaf is reliable evidence of photosynthesis.
Starch Testing Experiment
Leaves, Beaker, Test Tube, Bunsen burner, Ethanol, Iodine solution.
Boil the water and dip the leaf for one minute. After that, remove the leaf from water. Next is take ethanol in the test tube and boil the test tube in the bathtub. Then, put the boiled soft leaf in an ethanol test tube. The leaf will drop its chlorophyll in ethanol and turns light yellow. Then, remove the leaf from ethanol in a petri dish and put some iodine solution on a leaf. You will see leaf will turn into brown. That shows the starch present in the leaf.
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| A leaf is boiling in water |
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| Add Ethanol and leaf in test and boil in water tub |
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| Leaf started to boil and left colour(Chlorophyll) |
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| Add iodine on leaf and it turns brown |
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