Question:
Identify the monomer of natural rubber.
Identify the monomer of natural rubber.
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Natural rubber = cis-1,4-polyisoprene, so its monomer is isoprene.
Updated On: May 14, 2026
- Isoprene
- Polyacrylonitrile
- Chloroprene
- Tetrafluoroethylene
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The Correct Option is A
Solution and Explanation
Concept:
Natural rubber is a polymer formed by repeated addition of isoprene units. Its polymer is called cis-1,4-polyisoprene.
Step 1: Recall the monomer of natural rubber.
Natural rubber is obtained from: \[ \text{isoprene} \] Its structure is: \[ \text{CH}_2 = \text{C}(\text{CH}_3)-\text{CH}=\text{CH}_2 \]
Step 2: Eliminate the other options.
• Polyacrylonitrile is itself a polymer.
• Chloroprene is the monomer of neoprene.
• Tetrafluoroethylene is the monomer of Teflon. Hence, the correct answer is:
\[ \boxed{(A)\ \text{Isoprene}} \]
Natural rubber is a polymer formed by repeated addition of isoprene units. Its polymer is called cis-1,4-polyisoprene.
Step 1: Recall the monomer of natural rubber.
Natural rubber is obtained from: \[ \text{isoprene} \] Its structure is: \[ \text{CH}_2 = \text{C}(\text{CH}_3)-\text{CH}=\text{CH}_2 \]
Step 2: Eliminate the other options.
• Polyacrylonitrile is itself a polymer.
• Chloroprene is the monomer of neoprene.
• Tetrafluoroethylene is the monomer of Teflon. Hence, the correct answer is:
\[ \boxed{(A)\ \text{Isoprene}} \]
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