(B) $Cis-1,4-polyisoprene$ is the chemical name for natural rubber. It is a polymer of $2-methyl-1,3-butadiene$ (isoprene). The structure is as follow

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(B) $Cis-1,4-polyisoprene$ is the chemical name for natural rubber. It is a polymer of $2-methyl-1,3-butadiene$ (isoprene). The structure is as follows:$[-CH_2-C(CH_3)=CH-CH_2-]_n$Due to the $cis$ configuration of the double bonds,the polymer chains are coiled and exhibit elastic properties,making it natural rubber.

Class 12 Chemistry Polymers Composition, Properties and Uses of Polymer

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$Cis-1,4-polyisoprene$ is called:

KCET 2019 All KCET

A
Buna-$S$
B
Natural rubber
C
Buna-$N$
D
Neoprene

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Polymers

Subtopic

Composition, Properties and Uses of Polymer

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Which one of the following polymers will not catch fire?

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The polymer used for bulletproof glass coating is ......

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Which of the following statements is $NOT$ true for polymers?

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Match List-$I$ with List-$II$:

List-$I$ (Polymer) List-$II$ (Used in)

$A$. Bakelite $I$. Radio and television cabinets

$B$. Glyptal $II$. Electrical switches

$C$. $PVC$ $III$. Paints and lacquers

$D$. Polystyrene $IV$. Water pipes

Choose the correct answer from the options given below:

List-$I$ (Polymer)	List-$II$ (Used in)
$A$. Bakelite	$I$. Radio and television cabinets
$B$. Glyptal	$II$. Electrical switches
$C$. $PVC$	$III$. Paints and lacquers
$D$. Polystyrene	$IV$. Water pipes