COMEDK 2026 Morning Shift | Coordination Compounds Question 4 | Chemistry

The Crystal Field Stabilisation energy of (i) $\left[\mathrm{CoF}_6\right]^{3-}$ and (ii) $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$ are ⋯and ⋯⋯ respectively.

(i) $-2.8 \Delta_0$ (ii) $-2.4 \Delta_0$

(i) $2.8 \Delta_0$ (ii) $2.4 \Delta_0$

(i) $-0.6 \Delta_0$ (ii) $0.4 \Delta_0$

(i) $-0.4 \Delta_0$ ii) $0 \Delta_0$

COMEDK 2025 Evening Shift

MCQ (Single Correct Answer)

-0

Arrange the complex ions in the increasing order of their magnetic moments

A. $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$
B. $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}$
C. $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$
D. $\left[\mathrm{FeF}_6\right]^{3-}$

$\mathrm{D}<\mathrm{A}<\mathrm{B}<\mathrm{C}$

$\mathrm{B}<\mathrm{C}<\mathrm{A}<\mathrm{D}$

$\mathrm{D}<\mathrm{C}<\mathrm{B}<\mathrm{A}$

$\mathrm{A}<\mathrm{D}<\mathrm{C}<\mathrm{B}$

COMEDK 2025 Evening Shift

MCQ (Single Correct Answer)

-0

Which of the following compounds has electrons symmetrically distributed in both $\mathrm{t}_{2 \mathrm{~g}}$ and $\mathrm{e}_{\mathrm{g}}$ orbitals?

$\left[\mathrm{CoF}_6\right]^{3-}$

$\left[M n(C N)_6\right]^{4-}$

$\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right]^{3+}$

$\left[\mathrm{FeCl}_6\right]^{3-}$

COMEDK 2025 Evening Shift

MCQ (Single Correct Answer)

-0

Which of the coordination compounds [(i) to (v)] are used for the following processes :

A: Electroplating

B: Removal of excess copper from human body

C: Estimation of hardness of water

(i) DMG (ii) $\mathrm{Na}_2 \mathrm{EDTA}$ (iii) Cis-platin (iv) D-penicillamine (v) $\mathrm{K}\left[\mathrm{Au}(\mathrm{CN})_2\right]$

$\mathrm{A}=\mathrm{iv} \quad \mathrm{B}=\mathrm{i} \quad \mathrm{C}=\mathrm{iii}$

$A=i \quad B=i i i \quad C=i v$

$\mathrm{A}=\mathrm{v} \quad \mathrm{B}=\mathrm{iv} \quad \mathrm{C}=\mathrm{ii}$

$A=$ iii $\quad B=$ ii $\quad C=i$

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