28 June 2026

Scientific study on wet paper tearing

This topic explains the scientific principles behind material properties, which can serve as a useful illustrative example for questions regarding science and technology in daily life, though it is too granular for a direct question.

Questions

1. Explain the molecular mechanism behind the loss of structural integrity in paper when exposed to moisture. How does this phenomenon illustrate the role of hydrogen bonding in material science? 150 words
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Prelims

1. What is the primary reason for the reduction in the tensile strength of paper when it becomes wet?

   1. A Water increases the friction between cellulose fibers, making them brittle.
   2. B Water molecules chemically react with cellulose to form a new, weaker compound.
   3. C Water molecules replace the covalent bonds within the cellulose chains.
   4. D Water molecules disrupt hydrogen bonds between cellulose fibers and cause them to swell.