Which of the following can show geometrical isomerism?

• Correct answer
  A

  \(\mathrm{CHCl}=\mathrm{CHCl}\)
• B

  \(\mathrm{CH}_2=\mathrm{CCl}_2\)
• C

  \(\mathrm{CCl}_2=\mathrm{CHCl}\)
• D

  \(\mathrm{CH}_2=\mathrm{CH}_2\)

Solution

There are two geometrical isomer of 1, 2-dichloroethene, one is called cis -1, 2-dichloroethene and the other is called trans-1, 2-di-chloroethene.
Hence, the correct option is (a).

Hence, the correct answer is option: 'A'.