Isopropyl chloride is an example of :

primary alkyl halide

secondary alkyl halide

tertiary alkyl halide

quaternary alkyl halide

In isopropyl chloride, the chlorine is attached to a carbon that is only attached to two other carbon hence it is a secondary halide.

Whereas in isobutyl chloride, the chlorine is attached to a carbon that is only attached to one other carbon hence it is primary alkyl halide.