Which among the following statements about HD | vedclass

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(A) High-density polyethylene $(HDPE)$ is obtained by coordination polymerization using a $Ziegler-Natta$ catalyst.It has a higher melting point $(130

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It melts at a lower temperature than $LDP$.

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(A) High-density polyethylene $(HDPE)$ is obtained by coordination polymerization using a $Ziegler-Natta$ catalyst.It has a higher melting point $(130^{\circ}C)$ and higher density $(0.97 \ g \ cm^{-3})$ compared to $LDP$.It consists of linear polymer chains,which leads to greater strength,stiffness,and heat resistance.$LDP$ (Low-density polyethylene) is produced at high pressure $(1000-2000 \ atm)$ and high temperature $(350-570 \ K)$,whereas $HDPE$ is produced at low pressure $(6-7 \ atm)$ and moderate temperature $(333-343 \ K)$.Therefore,the statement that $HDP$ melts at a lower temperature than $LDP$ is false.

$List-I$ (Polymer)	$List-II$ (Monomer)
$(A)$ Neoprene	$(I)$ Acrylonitrile
$(B)$ Teflon	$(II)$ Chloroprene
$(C)$ Acrilan	$(III)$ Tetrafluoroethene
$(D)$ Natural rubber	$(IV)$ Isoprene

Which among the following statements about $HDP$ is $NOT$ true?

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$List-I$ (Polymer) $List-II$ (Monomer)

$(A)$ Neoprene $(I)$ Acrylonitrile

$(B)$ Teflon $(II)$ Chloroprene

$(C)$ Acrilan $(III)$ Tetrafluoroethene

$(D)$ Natural rubber $(IV)$ Isoprene

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