Bonding-Valence Bond Approach and Basic Ideas of Crystal Field Theory, Colour and Magnetic Properties NEET Questions

Inorganic Chemistry - Coordination Compounds

Bonding-Valence Bond Approach and Basic Ideas of Crystal Field Theory, Colour and Magnetic Properties MCQ Questions


13.
According to Valence Bond Theory, the observed magnetic moment (and hence magnetic behaviour) of a coordination complex is determined by the number of:
A.
Unpaired electrons present in the metal ion's d orbitals
B.
Coordination bonds formed
C.
Ligands surrounding the metal ion
D.
Total electrons in the complex
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ANSWER :
A. Unpaired electrons present in the metal ion's d orbitals
14.
A coordination compound in which all the electrons in the metal ion's d orbitals are paired is expected to be:
A.
Paramagnetic
B.
Antiferromagnetic
C.
Diamagnetic
D.
Ferromagnetic
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ANSWER :
C. Diamagnetic
15.
A coordination compound that contains one or more unpaired electrons in the metal ion's d orbitals is expected to be:
A.
Radioactive
B.
Diamagnetic
C.
Non-magnetic
D.
Paramagnetic
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ANSWER :
D. Paramagnetic
16.
One major limitation of Valence Bond Theory is that it fails to satisfactorily explain the:
A.
Formula of the complex
B.
Number of ligands attached to the metal
C.
Colour exhibited by most coordination compounds
D.
Overall geometry of most complexes
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ANSWER :
C. Colour exhibited by most coordination compounds
17.
Another significant limitation of Valence Bond Theory is that it does not provide a quantitative interpretation of:
A.
Magnetic properties, such as precise magnetic moment values
B.
The oxidation state of the metal
C.
The number of ligands present
D.
The overall shape of the complex
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ANSWER :
A. Magnetic properties, such as precise magnetic moment values
18.
Valence Bond Theory does not distinguish between weak field and strong field ligands, and hence cannot satisfactorily explain the:
A.
Molecular formula of the ligand
B.
Relative stabilities of coordination compounds
C.
Charge on the complex ion
D.
Total number of ligands in a complex
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ANSWER :
B. Relative stabilities of coordination compounds