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Starch

Starch is mad...

Question

Starch is made by photosynthesis in the leaves of plants. It is found in rice, potatoes, and many vegetables sources. It can be detected with a drop of iodine. In the presence of starch, iodine:

A

vapourises

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B

turns blue

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C

decolourises

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D

turns into a black solid

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Solution

The correct option is B turns blue
(B) Turns blue
When starch is mixed with iodine in water, an intensely blue colored starch/iodine complex is formed.

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Q. Which one of the following is the correct combination of relevant materials required for setting up an experiment to show that light in necessary for photosynthesis?
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(3) destarched leaves, strips of black paper, starch solution, and potassium iodide
(4) destarched leaves, strips of black paper, and iodide solution

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