4
MCQ (Single Correct Answer)
When 1 mole of $\mathrm{CrCl}_3 \cdot 6 \mathrm{H}_2 \mathrm{O}$ is treated with excess of $\mathrm{AgNO}_3, 3$ moles of AgCl are obtained. The formula of the complex is
A
$\left[\mathrm{CrCl}_3\left(\mathrm{H}_2 \mathrm{O}\right)_3\right] \cdot 3 \mathrm{H}_2 \mathrm{O}$
B
$\left[\mathrm{CrCl}_2\left(\mathrm{H}_2 \mathrm{O}\right)_4\right] \mathrm{Cl} \cdot 2 \mathrm{H}_2 \mathrm{O}$
C
$\left[\mathrm{CrCl}\left(\mathrm{H}_2 \mathrm{O}\right)_5\right] \mathrm{Cl}_2 \cdot \mathrm{H}_2 \mathrm{O}$
D
$\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3$
5
MCQ (Single Correct Answer)
The correct IUPAC name of $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]$ is
A
Diamminedichloridoplatinum (II)
B
Diamminedichloridoplatinum (IV)
C
Diamminedichloridoplatinum (0)
D
Dichloridodiammineplatinum (IV)
6
MCQ (Single Correct Answer)
The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species?
A
$\left[\mathrm{Fe}(\mathrm{CO})_5\right]$
B
$\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$
C
$\left[\mathrm{Fe}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$
D
$\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$
7
MCQ (Single Correct Answer)
Indicate the complex ion which shows geometrical isomerism.
A
$\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_4 \mathrm{Cl}_2\right]^{+}$
B
$\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}\right]$
C
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$
D
$\left[\mathrm{Co}(\mathrm{CN})_5(\mathrm{NC})\right]^{3-}$
8
MCQ (Single Correct Answer)
The CFSE for octahedral $\left[\mathrm{CoCl}_6\right]^{4-}$ is $18,000 \mathrm{~cm}^{-1}$. The CFSE for tetrahedral $\left[\mathrm{CoCl}_4\right]^{2-}$ will be
A
$18,000 \mathrm{~cm}^{-1}$
B
$16,000 \mathrm{~cm}^{-1}$
C
$8,000 \mathrm{~cm}^{-1}$
D
$20,000 \mathrm{~cm}^{-1}$