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1
COMEDK 2026 Morning Shift
MCQ (Single Correct Answer)
+1
-0

$$ \text { Match the Coordination compounds in Column I with the type of stereoisomerism given in Column II exhibited by them. } $$

$$
\text { Column I }
$$		 $$
\text { Column I }
$$
A $$
\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]
$$		 P fac-mer
B $$
\mathrm{Ni}\left[\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]
$$		 Q cis -trans
C $$
\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{NO}_2\right)_3\right]
$$		 R only cis isomer shows optical isomerism
D $$
\left[\mathrm{Pt} \mathrm{Cl}_2(\mathrm{en})_2\right]^{2+}
$$		 S does not exhibit isomerism.
A

$$ A-S \quad B-R \quad C-Q \quad D-P $$

B

$$ A-S \quad B-P \quad C-Q \quad D-R $$

C

$$ A-Q \quad B-S \quad C-O \quad D-R $$

D

$$ A-R \quad B-P \quad C-S \quad D-Q $$

2
COMEDK 2026 Morning Shift
MCQ (Single Correct Answer)
+1
-0

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.

A

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

B

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

C
(i) $-0.6 \Delta_0$        (ii) $0.4 \Delta_0$
D
(i) $-0.4 \Delta_0$         ii) $0 \Delta_0$
3
COMEDK 2025 Evening Shift
MCQ (Single Correct Answer)
+1
-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. $\left[\mathrm{FeF}_6\right]^{3-}$

A
$\mathrm{D}<\mathrm{A}<\mathrm{B}<\mathrm{C}$
B
$\mathrm{B}<\mathrm{C}<\mathrm{A}<\mathrm{D}$
C
$\mathrm{D}<\mathrm{C}<\mathrm{B}<\mathrm{A}$
D
$\mathrm{A}<\mathrm{D}<\mathrm{C}<\mathrm{B}$
4
COMEDK 2025 Evening Shift
MCQ (Single Correct Answer)
+1
-0
Which of the following compounds has electrons symmetrically distributed in both $\mathrm{t}_{2 \mathrm{~g}}$ and $\mathrm{e}_{\mathrm{g}}$ orbitals?
A
$\left[\mathrm{CoF}_6\right]^{3-}$
B
$\left[M n(C N)_6\right]^{4-}$
C
$\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right]^{3+}$
D
$\left[\mathrm{FeCl}_6\right]^{3-}$
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