Which of the following is NOT an ionic compound?

Correct option is B

The correct answer is (b) CO₂​

Explanation: Carbon dioxide (CO₂) is a covalent compound, not an ionic compound

Information Booster: 

• An ionic compound is a substance made up of ions, which are atoms that have gained or lost electrons and have a net positive or negative charge.
  
• A covalent compound is a molecule made up of two or more non-metal atoms that are held together by covalent bonds.
  
• A covalent bond is a chemical bond that forms when atoms share valence electrons. The shared electrons are attracted to the positive nuclei of both atoms, holding them together in the molecule.