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1
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Mohr's salt has the formula

A
$$\mathrm{FeSO}_4 \cdot 7 \mathrm{H}_2 \mathrm{O}$$
B
$$\mathrm{FeSO}_4\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2 \mathrm{O}$$
C
$$\mathrm{Fe}\left(\mathrm{SO}_4\right)_3\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2 \mathrm{O}$$
D
$$\mathrm{MgSO}_4 \cdot 7 \mathrm{H}_2 \mathrm{O}$$
2
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify the correct IUPAC name of $$[\mathrm{CoCl}_2(\mathrm{NO}_2)(\mathrm{NH}_3)_3]$$

A
Triamminedichloridonitrito- $$\mathrm{N}-\operatorname{cobalt}(\mathrm{III})$$
B
Dichloridotriamminenitrito-O-cobaltate(II)
C
Dichlorotriamminenitrito- $$\mathrm{N}-\operatorname{cobalt}(\mathrm{II})$$
D
Triamminedichloronitrito-O-cobaltate(III)
3
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Match the Coordination compounds given in Column I with their characteristic features listed in Column II.

S.No. Coordination compounds S.No. Characteristic features
W $$
\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right] \mathrm{Cl}_3
$$
 P $$
\text { Oxidation state }=+3 \text { Configuration }=\mathrm{d}^5 \quad \mu=5.92 \mathrm{BM}
$$
X $$
\mathrm{K}_4\left[\mathrm{Mn}(\mathrm{CN})_6\right.
$$		 Q $$
\text { Oxidation state }=+3 \text { Configuration }=\mathrm{d}^3 \quad \mu=3.87 \mathrm{BM}
$$
Y $$
\left[\mathrm{CrCl}_3(\mathrm{py})_3\right]
$$		 R $$
\text { Oxidation state }=+3 \text { Configuration }=d^6 \quad \mu=0 \mathrm{BM}
$$
Z $$
\mathrm{Cs}\left[\mathrm{FeCl}_4\right]
$$		 S $$
\text { Oxidation state }=+2 \text { Configuration }=\mathrm{d}^5 \quad \mu=1.732 \mathrm{BM}
$$

A
$$ \mathrm{W}=\mathrm{S} \quad \mathrm{X}=\mathrm{R} \quad \mathrm{Y}=\mathrm{Q} \quad \mathrm{Z}=\mathrm{P} $$
B
$$ \mathrm{W}=\mathrm{S} \quad \mathrm{X}=\mathrm{P} \quad \mathrm{Y}=\mathrm{Q} \quad \mathrm{Z}=\mathrm{R} $$
C
$$ \mathrm{W}=\mathrm{R} \quad \mathrm{X}=\mathrm{S} \quad \mathrm{Y}=\mathrm{P} \quad \mathrm{Z}=\mathrm{Q} $$
D
$$ \mathrm{W}=\mathrm{R} \quad \mathrm{X}=\mathrm{S} \quad \mathrm{Y}=\mathrm{Q} \quad \mathrm{Z}=\mathrm{P} $$
4
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which one of the following is an incorrect statement pertaining to the properties of Coordination compounds?

A
A square planar complex of the type Mabcd, where a, b, c and d are unidentate ligands, exhibits geometrical isomerism and exists in one cis-form and two trans-forms.
B
[$$\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{NO}_2$$] Cl2 exists in 2 forms, the red form and the yellow form which are linkage isomers.
C
$$\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$$ is called a Low spin complex.
D
Out of cis- $$\left[\mathrm{CrCl}_2(\mathrm{ox})_2\right]^{3-}$$ and trans- $$\left[\mathrm{CrCl}_2(\mathrm{ox})_2\right]^{3-}$$, the trans isomer is optically inactive.
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