Will Not Show Geometrical Isomerism?

Hint: Those compounds in which same groups are attached to the one carbon atom of the two double bonded carbon atoms doesn't show geometrical isomerism or cis – trans isomerism.

Which of the following Cannot show geometrical isomerism?

In 1- Chloroethene two groups are same on one carbon atom so it can not show geometrical isomerism.

Which will not form geometrical isomers?

For the common structures which contain two or more different ligands, geometric isomers are possible only with square planar and octahedral structures (i.e., geometric isomers cannot exist for linear and tetrahedral structures).