Question

The monomer of natural rubber is:

• A. isoprene
• B. adipic acid
• C. vinyl chloride
• D. acrylonitrile

Answer 1

Answer: (A)

Key Idea: Monomer polymerize to form polymers.
(a) $\underset{\begin{array}{c}\text{isoprene}\\ \text{or}\\ 2-\text{methyl}1,3-\text{butadiene}\end{array}}{C{H}_2=\stackrel{C{H}_3}{\stackrel{|}{C}}-CH=C{H}_2}$ It is monomer of natural rubber.
(b) Adipic acid is copolymer of nylon-66.
(c) Vinyl chloride is monomer of PVC.
(d) Acrylonitrile is monomer of PAN.