Yes! Since it has un-paired electrons: ) Actually C2 isn't paramagnetic. There's certain type of diagram how to determine whether molecule is paramagnetic or not. And C2 isn't. Instead C2(2+) would...
Diamagnetic: a material wich become magnetic only in the presece of an external magnetic field. The magnetic permeability is under 1. Paramagnetic: a material wich become magnetic only in the presece...