. In which of the following pairs both the species are not isostructural
(a) Diamond, Silicon carbide
Correct Option is: C
In XeF4, Xe is sp3d2 hybridised and structure is square planar while in XeO4, Xe is sp3 hybridised and the structure is tetrahedral. In diamond and silicon carbide, central atom is sp3 hybridised and hence, both are isostructural. NH3 and PH3, both are pyramidal and central atom in both cases is sp3 hybridised. SiCl4 and PCl4+, both are tetrahedral and central atom in both cases is sp3 hybridized.