Which of the following statements is incorrec | vedclass

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(D) $Novolac$ is a linear polymer formed by the condensation reaction of phenol and formaldehyde in the presence of an acid catalyst.It is used in pai

Vedclass · Accepted Answer

It is a cross-linking polymer.

Vedclass · Answer

(D) $Novolac$ is a linear polymer formed by the condensation reaction of phenol and formaldehyde in the presence of an acid catalyst.It is used in paints and as a coating material.When $Novolac$ is heated with formaldehyde,it undergoes cross-linking to form an infusible solid mass known as $Bakelite$.Therefore,the statement that $Novolac$ is a cross-linking polymer is incorrect,as it is a linear polymer that forms a cross-linked structure only upon further heating with formaldehyde.

Column $- A$	Column $- B$
$(A)$ Polystyrene	$(i)$ Paints and lacquers
$(B)$ Glyptal	$(ii)$ Rain coats
$(C)$ Polyvinyl chloride	$(iii)$ Manufacture of toys
$(D)$ Bakelite	$(iv)$ Computer discs

Which of the following statements is incorrect about $Novolac$?

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Match the polymers in column $- A$ with their main uses in column $- B$ and choose the correct answer.

Column $- A$ Column $- B$

$(A)$ Polystyrene $(i)$ Paints and lacquers

$(B)$ Glyptal $(ii)$ Rain coats

$(C)$ Polyvinyl chloride $(iii)$ Manufacture of toys

$(D)$ Bakelite $(iv)$ Computer discs

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