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Iodine turns blue in the presence of starch

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14y ago

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Does sugar turn blue when mixed with iodine?

Yes, sugar does not turn blue when mixed with iodine. Iodine reacts with starch, turning it into a blue-black color. Sugar does not contain starch, so it will not have a reaction with iodine in this way.


What would you say about a subtance if it did not turn blue-black with iodine?

If a substance didn't turn blue or black with iodine, it means that it didn't form any complex with iodine. When iodine forms a complex with the substance, the complex is generally blue in color.


Why does powdered sugar turn black in iodine?

it does not turn blue when mixed with iodine. I don't think there is a colour change.


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 is starch with iodine solution?

it is a yellowish/orange colour but when iodine is present, than it will turn an dark-blue/black colour


What color does iodine turn in the presence of startch?

Iodine turns blue-black in the presence of starch due to the formation of a complex between iodine and starch molecules.


What colour should the leaf turn when iodine is added?

The leaf should turn blue-black when iodine is added, indicating the presence of starch.


What chemical is used to test for starch and what is the result if starch is present?

The chemical is called Iodine solution. If starch is present, the iodine solution will turn from amber to blue black.


Why do en leaves not turn blue backby iodine?

En leaves do not turn blue-black with iodine because they do not contain starch, which is what iodine reacts with to produce the characteristic color change. Starch is a carbohydrate produced by plants through photosynthesis, so leaves that do not contain starch will not show the blue-black color reaction with iodine.


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

dark blue - purple


Which things can make blue litmus paper turn to red?

iodine