Question

does 2-chlorobut-2-ene have any asymmetric carbon

Answer 1

Carbon which is attached to 4 different groups is said to be asymmetric carbon. Since in the given compound there is no carbon which is attached to 4 different atoms/groups therefore there is no asymmetric carbon. However, carbon 2 which contain 3 different group seems to be asymmetric but it is not, as any carbon which forms double or triple bond are not at all asymmetric.