The piece of metal is magnetic and is lustrous. Is this statement an example of physical or chemical properties being describe about the metal? what is the answer

Answer:

The correct answers are options C, that is, silver tarnishes and becomes black when exposed to oxygen, and option E, that is, diesel fuel burns when it is heated.  

Chemical changes refer to the modifications in which the chemistry at molecular level is modified as the initial substance gets transformed into a new and different final substance. This change occurs with the dissociation of old bond and production of new bonds respectively.  

I hope this helps. :).