For which of the following compounds are geom | vedclass

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(B) Geometrical isomerism occurs in alkenes when each carbon atom of the double bond is attached to two different groups. In $ClBrC = CBrCl$ ($1$,$2$-

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$ClBrC = CBrCl$

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(B) Geometrical isomerism occurs in alkenes when each carbon atom of the double bond is attached to two different groups. In $ClBrC = CBrCl$ ($1$,$2$-dichloro$-1,2-$dibromoethene),each carbon is bonded to a $Cl$ atom and a $Br$ atom,which are different. Therefore,it can exhibit geometrical isomerism (cis and trans forms). In the other options,at least one carbon atom is bonded to two identical groups (e.g.,$Cl_2C=$,$CBr_2=$,or $(CH_3)_2C=$),which prevents geometrical isomerism.

For which of the following compounds are geometrical isomers possible?

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