Which of the following is not a condensation | vedclass

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(C) Condensation polymers are formed by the repeated condensation reaction between two different bi-functional or tri-functional monomeric units,usual

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Buna-$S$

Vedclass · Answer

(C) Condensation polymers are formed by the repeated condensation reaction between two different bi-functional or tri-functional monomeric units,usually involving the loss of small molecules like $H_2O$,$HCl$,or $NH_3$.$Dacron$ (Terylene) is a polyester formed by condensation of ethylene glycol and terephthalic acid.$Bakelite$ is a phenol-formaldehyde resin formed by condensation polymerization.$Starch$ is a natural polymer formed by the condensation of glucose units.$Buna-S$ is a synthetic rubber formed by addition polymerization of $1,3-butadiene$ and styrene. Therefore,it is an addition polymer,not a condensation polymer.

List-$I$ (Polymers)	List-$II$ (Type)
$A$. Buna-$N$-Rubber	$I$. Fibre
$B$. Terylene	$II$. Thermosetting polymer
$C$. Polystyrene	$III$. Elastomer
$D$. Urea-Formaldehyde resin	$IV$. Thermoplastic polymer

Which of the following is not a condensation polymer?

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List-$I$ (Polymers) List-$II$ (Type)

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$B$. Terylene $II$. Thermosetting polymer

$C$. Polystyrene $III$. Elastomer

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