17
MCQ (Multiple Correct Answer)
Which of the following options are correct for $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$ complex?
A
$d^2 s p^3$ hybridisation
B
$s p^3 d^2$ hybridisation
C
Paramagnetic
D
Diamagnetic
18
MCQ (Multiple Correct Answer)
An aqueous pink solution of cobalt(II) chloride changes to deep blue on addition of excess of HCl . This is because .............. .
A
$\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ is transformed into $\left[\mathrm{CoCl}_6\right]^{4-}$
B
$\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ is transformed into $\left[\mathrm{CoCl}_4\right]^{2-}$
C
tetrahedral complexes have smaller crystal field splitting than octahedral complexes
D
tetrahedral complexes have larger crystal field splitting than octahedral complex
19
MCQ (Multiple Correct Answer)
Which of the following complexes are homoleptic?
A
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$
B
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$
C
$\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$
D
$\left[\mathrm{Ni}\left(\mathrm{NH}_{34} \mathrm{Cl}_2\right]\right.$
20
MCQ (Multiple Correct Answer)
Which of the following complexes are heteroleptic?
A
$\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right]^{3+}$
B
$\left[\mathrm{Fe}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$
C
$\left.\left[\mathrm{Mn}(\mathrm{CN})_6\right)\right]^{4-}$
D
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]$
21
MCQ (Multiple Correct Answer)
Identify the optically active compounds from the following
A
$\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}$
B
trans $-\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}$
C
cis $-\left[\mathrm{Co}(\mathrm{en}){ }_2 \mathrm{Cl}_2\right]^{+}$
D
$\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right]$