Assuming the bond direction to the z-axis, which of the overlapping of atomic orbitals of two atom (A) and (B) will result in bonding? (I) s-orbital of A and px-orbital of B (II) s-orbital of A and pz

Question

Assuming the bond direction to the z-axis, which of the overlapping of atomic orbitals of two atom (A) and (B) will result in bonding? (I) s-orbital of A and px-orbital of B (II) s-orbital of A and pz orbital of B (III) py-orbital of A and pz orbital of B (IV) s-orbital of both (A) and (B)

Prashant Kotian · Accepted Answer

Correct answer: D. Step 1: Classify the structural types of the given oxides: CO, CO2, and P2O5 form molecular crystals held by weak intermolecular forces. Step 2: SiO2 (silica) forms a giant three-dimensional covalent network where each silicon atom is tetrahedrally bonded to four oxygen atoms. Step 3: Breaking these strong network covalent bonds requires a vast amount of energy, resulting in a very high melting point compared to molecular oxides.

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