Question

which of the following will give blue black colour when tested with iodine options are boiled and smashed potato slice of bread glucose solution mustard oil

Answer 1

Boiled and smashed potato

slice of bread

Both of these contains carbohydrates which react with iodine solution to show a blue-black colour.

Answer 2

Explanation:

ii and iv is the answer because bread contains starch carbohydrate and mustard oil produced by mustard seeds also contains starch carbohydrate.

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