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NTA Abhyas NEET2020ChemistryBiomoleculesPractice

What is the polydispersity index of polymer if the mass average molecular mass & number average molecular mass of a polymer are respectively 40,000 and 30,000?

Options

  1. A< 1
  2. B> 1
  3. C1
  4. D0

Correct answer

B. > 1

Step-by-step solution

Average number molecular weight M n ¯ = 30,000 Average mass molecular weight M w ¯ = 40,000 Polydispersity index (PDI) = M w ¯ M n ¯ = 40,000 30,000 = 1.33

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