Select the incorrect statement about N2F4 and N2H4 : (I) In N2F4, d-orbitals are contracted by elect — Chemical Bonding Chemistry Question
Question
Select the incorrect statement about N2F4 and N2H4 : (I) In N2F4, d-orbitals are contracted by electronegative fluorine atoms, but d-orbital contraction is not possible by H-atom in N2H4 (II) The N—N bond energy in N2F4 is more than N—N bond energy in N2H4 (III) The N—N bond length in N2F4 is more than that of in N2H4 (IV) The N—N bond length in N2F4 is less than that of in N2H4 Choose the correct code :
💡 Solution & Explanation
Step 1: According to Fajan's rules, due to the exceptionally small size of the Li^+ cation, it has a very high polarizing power, making LiCl significantly more covalent than NaCl. Step 2: This covalent character explains why LiCl has a lower melting point, dissolves more in organic solvents, and fused LiCl is less conducting than fused NaCl (due to lower ionic concentration). Step 3: However, when dissolved in water, LiCl is highly soluble and ionizes completely into hydrated Li^+ and Cl^- ions just like NaCl, making statement (c) wrong.