A student accidentally spilt a few drops of a solution over the shirt. The area became blue-black because the solution was:

an acid which burnt the patch of cloth

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iodine which reacted with starched part of shirt

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potassium dichromate which oxidised the piece of shirt

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HCl which reacted with metanil pigment of the shirt

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Solution

The correct option is B iodine which reacted with starched part of shirt
Iodine which reacted with starched part of shirt makes that area become blue-black.

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A student accidentally spilt a few drops of a solution over the shirt. The area became blue-black because the solution was:

The correct option is B iodine which reacted with starched part of shirtIodine which reacted with starched part of shirt makes that area become blue-black.

The correct option is B iodine which reacted with starched part of shirt
Iodine which reacted with starched part of shirt makes that area become blue-black.