1.

Differentiate between the following pairs of polymers based on the property mentioned against each : (i) Novolac and Bakelite (Structure) (ii) Buna-S and Terylen (Intermolecular forces).

Answer» (i) Novaloc is a linear polymer while bakelite is highly cross-linked polymer. The monomer units in both of them are phenol and formaldehyde.
(ii) Buna-S is an elastomer in which attractive forces are quite weak. Terylene is a fibre with strong intermolecular attractive forces present.


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