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.

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

Similar Questions

The repeating unit of organosilicon polymers (silicones) is:

Arrange the following in decreasing order of their intermolecular forces:
$(a)$ Nylon $6,6$
$(b)$ Buna-$S$
$(c)$ Polyethene

Which of the following statements are correct?
$a$. Natural rubber becomes soft and sticky at high temperature.
$b$. Neoprene is a polymer of $2-$chloro$-1,3-$butadiene.
$c$. Nylon $6,6$ is a polyamide fibre.
$d$. Buna$-S$ is an example of a homopolymer.

Name the polymer used in laminating sheets and give the name of monomeric units involved in its formation.

Which of the following is a cross-linked, thermosetting polymer?

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