Choose the incorrect statement
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Among the options, the incorrect statement is: "Trisilylamine is triangular planar w.r.t. central atom."
While ammonia (NH3) is pyramidal due to sp3 hybridization, trisilylamine (N(SiH3)3) is planar. This is because of pπ-dπ back bonding between the nitrogen atom's lone pair and silicon's empty d-orbitals, which reduces the lone pair repulsion and allows for sp2 hybridization and a trigonal planar geometry. The statement incorrectly claims it is planar, implying this is an error, but it is actually correct. The truly incorrect statement is that [Co(OX)3]3– is an outer orbital complex. Oxalate (OX) is a strong field ligand, causing pairing of electrons in the 3d orbitals of Co3+ (d6), making it an inner orbital (low-spin) complex, not outer orbital.
Final Answer: [Co(OX)3]3– is outer d-orbital complex.