Question

2.
Write on a paper with a tooth pick dipped
in lemon juice. Dry the paper and then
press it with hot iron. The letter on paper
change into dark brown. Why?​

Answer 1

Explanation:

this happens due to the breaking of carbon present in the lime juice. ... Writing with lime juice on paper makes an impression of invisible ink because as we heat the paper the ink starts appearing or say becomes visible.

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