Question

which of these is a covalent compound?
○ mgo
○ alcl₃
○ co
○ licl

Explanation:

Covalent compounds are formed when non - metals share electrons. In \(MgO\), \(Mg\) (a metal) and \(O\) (a non - metal) form an ionic compound. In \(AlCl_{3}\), although \(Al\) is a metal, due to its small size and high charge density, it forms a compound with significant covalent character. But \(CO\) is a classic covalent compound as both \(C\) and \(O\) are non - metals sharing electrons. In \(LiCl\), \(Li\) (a metal) and \(Cl\) (a non - metal) form an ionic compound.

Answer:

CO