Question

Why paper turns yellow over time?​

Answer 1

Answer:

If eventually turns paper yellow because of oxidation. Paper is made from wood, which is made up mainly of white cellulose. Wood also has a lot of a dark substance in it called lignin, which ends up in the paper, too, along with the cellulose. The exposure of lignin to air and sunlight is what turns paper yellow.

Explanation:

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Answer 2

Answer:

Paper is made up of wood, which contains cellulose & lignin. When this lignin is exposed to air, it undergoes oxidation & turns yellow in color.

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