The official answer is **6,C**,the usual octahedral coordination illustrated by complexes such as $[SnCl_6]^{2-}$. Coordination number counts donor atoms directly attached to the central ion and is different from its +4 oxidation state. The word maximum should be understood within this conventional complex-ion context rather than as a universal claim over all solid-state tin compounds.
More Fundamentals of Environmental Chemistry questions
GATE 2024 ES Q65– A bottle initially has 400 g ethanol. Half is used before a 90-day vacation. The bottle is…
GATE 2023 ES Q41– Match J Dalton, K Fick, L Henry, M Stokes with i Diffusion, ii Gas-mixture pressure, iii…
GATE 2022 ES Q28– For Gibbs free-energy change ΔG, select all correct statements.