Question : Browning of paper in old books is caused by
Option 1: frequent use
Option 2: lack of aeration
Option 3: collection of dust
Option 4: oxidation of cellulose
Correct Answer: oxidation of cellulose
Solution : The correct option is the oxidation of cellulose .
The browning of paper in old books is primarily caused by the oxidation of cellulose, a process accelerated by exposure to light, air and moisture. Over time, atmospheric oxygen reacts with cellulose fibres, leading to chemical changes that result in the characteristic discolouration and deterioration of paper.
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