Non-metals form covalenrt chlorides because (a) they can give electrons to chlorine
(b) they can share electrons with chlorine
(c) they can give electrons to chlorine atom to form chloride ion
(d) they cannot share electrons with chlorine atom

The msds for glacial acetic acid says that it is a flammable liquid that can severely burn any human tissue it comes in contact with. it reacts with bases, various metals, and strong oxidizing agents. its vapors can form explosive mixtures with air.