What type of isomerism is found in but-2-ene?

But-2-ene has the chemical structure $CH_{3}-CH=CH-CH_{3}$.

Each carbon atom of the double bond is attached to two different groups, specifically a hydrogen atom and a methyl group.

Due to the restricted rotation around the carbon-carbon double bond, it can exist in two different spatial arrangements.

These arrangements correspond to the cis and trans isomers.

Thus, but-2-ene exhibits geometrical isomerism.

Answer: Geometrical isomerism