Transition Elements and Coordination Chemistry Basics - Numerical Applications
Q. What is the formula for the complex formed when iron(III) ions react with thiocyanate ions?
-
A.
[Fe(SCN)3]
-
B.
[Fe(SCN)2]
-
C.
[Fe(SCN)6]3+
-
D.
[Fe(SCN)4]2+
Solution
The complex formed is [Fe(SCN)3], where iron(III) ions coordinate with thiocyanate ions.
Correct Answer: A — [Fe(SCN)3]
Q. What is the hybridization of the central metal ion in the complex [Ni(CO)4]?
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
d2sp3
Solution
In [Ni(CO)4], nickel is in the +0 oxidation state and uses sp3 hybridization to form four equivalent bonds with the CO ligands.
Correct Answer: C — sp3
Q. What is the primary factor that determines the color of transition metal complexes?
-
A.
The oxidation state of the metal
-
B.
The type of ligands
-
C.
The coordination number
-
D.
The size of the metal ion
Solution
The type of ligands affects the splitting of d-orbitals, which in turn influences the color of the transition metal complex.
Correct Answer: B — The type of ligands
Q. Which of the following is a strong field ligand?
-
A.
I-
-
B.
Cl-
-
C.
CN-
-
D.
H2O
Solution
CN- (cyanide) is a strong field ligand that causes large splitting of d-orbitals in transition metal complexes.
Correct Answer: C — CN-
Showing 1 to 4 of 4 (1 Pages)
