Sum of \sigma and \pi-bonds in NH4^+ cation is ..... — Chemical Bonding Chemistry Question

💡 Solution & Explanation

Step 1: Evaluate statement (a): H2O and NH3 indeed have the highest melting points in their respective hydrides groups due to intermolecular hydrogen bonding. Step 2: Evaluate statement (b): In group 14, CH4 has the smallest size and lowest molecular mass, leading to the weakest London dispersion forces and the lowest boiling point. Evaluate statement (c): Formic acid forms a stable cyclic dimer in gaseous and liquid phases via two intermolecular hydrogen bonds. Step 3: Since all statements (a, b, and c) are correct, option (d) is the correct choice.