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Blue food coloring. .

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What causes a nose to turn blue?

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What color does iodine turn a onion?

When iodine comes into contact with starch, it forms a blue-black complex. Therefore, if you were to apply iodine to a cut onion, the starch present in the onion cells would react with the iodine, turning the onion a blue-black color. This color change is a common test for the presence of starch in biological samples.


Why do the cell walls of onions turn blue-black when put with iodine?

The blue-black color change occurs due to the reaction between iodine and starch present in the onion cell walls. When iodine comes in contact with starch, it forms a complex that absorbs light in the visible spectrum, giving the characteristic blue-black coloration.


Why does 4 into 1 exhaust turn blue?

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What is onion peel generally stained with?

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Which part of onion enhanced when it is fried?

It's taste is enhanced. Frying the onion causes the naturally occurring sugars in the onion to become caramelised, creating sweetness.


What causes black dyed hair to turn green?

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You planted onion blubs in your garden when grown they turned soft?

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What causes nail to turn blue or black?

Your nail turns blue when the blood clot in it.


Can a carrot turn you blue?

No a carrot can not turn you blue.