Which of the following can show geometrical isomerism?

Which of the following can show geometrical isomerism?
  1. \(\mathrm{CHCl}=\mathrm{CHCl}\)
  2. \(\mathrm{CH}_2=\mathrm{CCl}_2\)
  3. \(\mathrm{CCl}_2=\mathrm{CHCl}\)
  4. \(\mathrm{CH}_2=\mathrm{CH}_2\)

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).

Asked in: AP EAMCET 2020 (21 Sep Shift 2)

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