Na A B C D E (complex) — s Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Sodium bicarbonate (NaHCO3) is an ionic compound composed of sodium cations (Na+) and bicarbonate anions (HCO3-), which are held together by ionic bonds. Step 2: Inside the polyatomic bicarbonate anion, the hydrogen, carbon, and oxygen atoms are linked through covalent bonds. In the solid crystal lattice, these bicarbonate units are further held together by intermolecular hydrogen bonding. Step 3: Consequently, all three types of bonds (ionic, covalent, and hydrogen bonds) are present in sodium bicarbonate, making option (d) the correct choice.