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Iodine turns purple when it reacts with starch because the iodine molecules fit inside the coil structure of the starch molecules forming a complex. This complex absorbs light in the visible spectrum, giving the solution a purple color.

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Q: Why did the iodine turn color?
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Related questions

What color does iodine turn when it is reacted with starches?

purple


What color does starch turn under iodine?

Black


What color does iodine turn a onion?

blue


What color does iodine turn in starch?

Iodine turns blue-black in the presence of starch.


What color does iodine turn when a starch is present?

Iodine turns blue-black in the presence of starch.


What color does a iodine turn when there is no starch in a leaf?

Iodine turns a yellow-brown color when there is no starch present in a leaf. This color change indicates the absence of starch, which is detected by the iodine as it interacts with the leaf's compounds.


What color does CaSO4 turn into with iodine?

When calcium sulfate (CaSO4) is mixed with iodine, it forms a yellowish-brown color due to the reaction between the calcium sulfate and iodine.


What is the color of the endosperm after applying iodine solution?

The endosperm will turn blue-black in color when iodine solution is applied, indicating the presence of starch.


What color does iodine turn if a starch is present?

Iodine turns blue-black in color in the presence of starch.


What color does iodine turn when you do an experiment for starch?

dark blue - purple


What color does egg white turn when iodine is added?

Egg white turns a blue-black color when iodine is added due to the reaction between the iodine and the proteins present in the egg white.


What will happen to a leaf when you put iodine solution into it?

If iodine solution is added to a leaf, it will turn blue-black in color. This is due to the presence of starch in the leaf which reacts with iodine to produce this color change.