COMEDK · Chemistry · 24. Coordination Compounds
Given below are 4 statements. Two of these are correct statements. Identify them.
A. \(\mathrm{Co}^{2+}\) is easily oxidised to \(\mathrm{Co}^{3+}\) in the presence of a strong ligand like \(\mathrm{CN}^{-}\)
B. \([\mathrm{Fe}(\mathrm{CN})_6]^{4-}\) is an octahedral complex ion which is paramagnetic in nature.
C. Removal of \(\mathrm{H}_2 \mathrm{O}\) molecules from \([\mathrm{Ti}(\mathrm{H}_2 \mathrm{O})_6] \mathrm{Cl}_3\) on strong heating converts it to a colourless compound.
D. Crystal Field splitting in Octahedral and Tetrahedral complexes is given by the equation \(\Delta_0=4 / 9 \Delta_t\)
- A C & B
- B A & D
- C B & D
- D A & C
Answer & Solution
Correct Answer
(D) A & C
Step-by-step Solution
Detailed explanation
Statement A is correct. In the presence of strong field ligands like \(\mathrm{CN}^{-}\), the crystal field splitting energy is high, which stabilizes the \(\mathrm{Co}^{3+}\) oxidation state (\(d^6\) configuration) over \(\mathrm{Co}^{2+}\) (\(d^7\) configuration) due to the…
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