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  1. Natural polymer amongst the following is
  2. The element, with atomic number 118, will be
  3. Heat of combustion ΔH for C(s) , H₂(g)and CH₄(g) are -94, -68 and -213 kcal/mol.
  4. In a closed insulated container a liquid is stirred with a paddle to increase
  5. The mixture of n-hexane and n-heptane is an example of