1
KCET 2025
MCQ (Single Correct Answer)
+1
-0

A member of the Lanthanoid series which is well known to exhibit +4 oxidation state is

A
Samarium
B
Europium
C
Erbium
D
Cerium
2
KCET 2025
MCQ (Single Correct Answer)
+1
-0

In which of the following pairs, both the elements do not have $(n-1) d^{10} n s^2$ configuration?

A
$\mathrm{Cu}, \mathrm{Zn}$
B
$\mathrm{Zn}, \mathrm{Cd}$
C
$\mathrm{Cd}, \mathrm{Hg}$
D
$\mathrm{Ag}, \mathrm{Cu}$
3
KCET 2025
MCQ (Single Correct Answer)
+1
-0

A ligand which has two different donor atoms and either of the two ligates with the central metal atom/ion in the complex is called ___________

A
Chelate ligand
B
Unidentate ligand
C
Polydentate ligand
D
Ambidentate ligand
4
KCET 2025
MCQ (Single Correct Answer)
+1
-0

Which of the following statements are true about $\left[\mathrm{NiCl}_4\right]^{2-}$ ?

(a) The complex has tetrahedral geometry

(b) Co-ordination number of Ni is 2 and oxidation state is +4

(c) The complex is $\mathrm{sp}^3$ hybridised

(d) It is a high spin complex

(e) The complex is paramagnetic

A
a,c,d and e
B
a,b,d and e
C
b,c,d and e
D
a,b,c and d
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