Question

The repeat unit in polystyrene is:

Options

• 

• \[\begin{array}{cc}
  \ce{- CH2 - CH -}\\
  \phantom{...........}|\\
  \phantom{...........}\ce{Cl}\\
  \end{array}\]

• \[\begin{array}{cc}
  \ce{- CH2 - CH -}\\
  \phantom{...........}|\\
  \phantom{............}\ce{CN}\\
  \end{array}\]

• \[\begin{array}{cc}
  \ce{- CH2 - CH -}\\
  \phantom{...........}|\\
  \phantom{............}\ce{Br}\\
  \end{array}\]

Answer 1

Explanation:

This structure consists of a standard ethylene backbone with a pendant phenyl ring (a benzene ring) attached to alternating carbon atoms. It is formed through the addition polymerisation of the styrene monomer. [1, 2, 3, 4, 5]