Answer: The correct answer is Option B.
Explanation:
Compound having oppositely charged ions are considered as ionic compounds.
Ionic compounds are formed when complete transfer of electrons takes place between the atoms forming a bond. This bond is formed between a metal and a non-metal or a polyatomic cation and an non-metal or a metal and a polyatomic anion. For Example: [tex]NaCl,NH_4Cl,BaSO_4[/tex] etc..
Covalent compounds are formed when sharing of electrons takes place between the atoms forming a bond. This bond is formed between two non-metals. For Example: [tex]H_2O,SO_2[/tex] etc..
For the given options:
Option A: [tex]OCl_2[/tex]
Oxygen and chlorine both are non-metals. Thus, it is forming a covalent compound.
Option B: [tex]Na_2O[/tex]
Sodium is a metal and oxygen is a non-metal. Thus, it is forming an ionic compound and contain oppositely charged ions.
Option C: [tex]NH_3[/tex]
Nitrogen and hydrogen both are non-metals. Thus, it is forming a covalent compound.
Option D: [tex]SCl_2[/tex]
Sulfur and chlorine both are non-metals. Thus, it is forming a covalent compound.
Hence, the correct answer is Option B.
