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JEE Main levelOne or more correct optionsDifficulty 2 of 3pl241

The two compounds shown are heated with methanal in the presence of a catalyst. Select all correct statements about the product.

  1. AIt is a condensation polymer and water is eliminated
  2. BHeating produces a 3-D crosslinked network, so it is thermosetting
  3. CIt is used to make unbreakable crockery
  4. DIt is a linear thermoplastic that softens on heating and can be remoulded

Answer: A, B, C

Melamine (three amino groups) and formaldehyde form melamine-formaldehyde resin by condensation with loss of water. Because melamine is trifunctional the chains crosslink into a 3-D network, giving a thermosetting plastic used for unbreakable crockery. Statement D describes a linear thermoplastic, which is wrong.
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