Question

Can anyone help me what is alum?

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Answer 1

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what is alum?

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a colourless astringent compound which is a hydrated double sulphate of aluminium and potassium, used in solution in dyeing and tanning.

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Answer 2

an alum is a type of chemical compound, usually a hydrated double sulphate salt of aluminium......

hope it will help u ....

be happy. dear....