1.

How is Novolac prepared? OR Write the reaction to prepare Novolac polymer.

Answer»

Solution :The monomers PHENOL and FORMALDEHYDE undergo polymerisation in the presence of alkali or acid as castalyst. Phenol reacts with formaldehyde to form ORTHO or p-hydroxy methyl phenols, which FURTER reacts with phenol to form a linear POLYMER called Novolac. It is used in paints.


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