PF3 is stronger Lewis base than PH3. — Chemical Bonding Chemistry Question

💡 Solution & Explanation

Step 1: A network solid (covalent network crystal) consists of atoms held together by covalent bonds in a continuous 3D network. Step 2: Analyze the substances: SiO2 (quartz) and Diamond are classic network solids with exceptionally high melting points. In contrast, P4O10, P4O6, and SO3 are molecular solids consisting of discrete individual molecules. Step 3: Thus, the pair containing only network solids is Diamond and SiO2, corresponding to option (d).