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  3. 12th Class
  4. Chemistry

12th Class Chemistry Sample Paper Chemistry Sample Test Paper-2

  • question_answer
      (i) Explain the difference between Buna-N and Buna-S. (ii) Arrange the following polymers in increasing order of their intermolecular forces. (a) Nylon-66, buna-S, polythene                               (b) Nylon-6, neoprene, polyvinyl chloride               [2 - 1]

    Answer:

      (i) Difference between Buna-N and Buna-S
    Buna-N Buna-S
    Monomers Vinyl cyanide and 1, 3-buta-diene   Elastiomers Monomers Styrene and 1,3-buta-diene Elastiomers
    (ii) (a) Buna-S < polythene < nylon-66          [1] (b) Neoprene < polyvinyl chloride < nylon-6 [1]


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