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Question

On treatment with iodine, the presence of starch gives blue-black colour because


A

Iodide ion is present

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B

Starch is actually blue-black in colour

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C

Minerals are present

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D

None of the above

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Solution

The correct option is A

Iodide ion is present


Iodine element in the presence of iodide ion will give the characteristic blue-black colour with starch.


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