Stability of complex ion, Crystal Field Theory - Free MCQ Practice Test
MCQ Practice Test & Solutions: Test: Stability of complex ion, Crystal Field Theory (20 Questions)
You can prepare effectively for JEE Chemistry for JEE Main & Advanced with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Stability of complex ion, Crystal Field Theory". These 20 questions have been designed by the experts with the latest curriculum of JEE 2026, to help you master the concept.
Test Highlights:
- - Format: Multiple Choice Questions (MCQ)
- - Duration: 20 minutes
- - Number of Questions: 20
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, find the value of 
?Detailed Solution: Question 1
has zero oxidation state, as has zero oxidation state in the compound.
is 
has 6 valencies, as 
in this state is stable due to half-filled orbitals. Now, for 6 valencies, 
is required. Therefore, 
The compound is 
.Statement Type
Direction (Q. No. 25) This section is based on Statement I and Statement II. Select the correct answer from the codes given below.
Q.
Statement I : Mn(π— C3H5)(CO)4, obey effective atomic number rule.
Statement II : π-allyl ligand act as a 3e- donor.
Detailed Solution: Question 2
In Mn2(CO)10, the number of CO molecules in between the metal atoms are
Detailed Solution: Question 3
The correct order for wavelengths of absorption in the visible region for the following complexes will be
Detailed Solution: Question 4
,
and (III) 
are made of 
and ligands 
and 
respectively. The field strength order of the ligands is
or 
Which will give a white precipitate with 
in aqueous solution
Detailed Solution: Question 5
Detailed Solution: Question 6
, larger the stability
that exists in solution.Amongst 
and 
, which are the colourless species?
(atomic number of Ti = 22, Co = 27, Cu = 29, Ni = 28)
and , which are the colourless species?(atomic number of Ti = 22, Co = 27, Cu = 29, Ni = 28)
Detailed Solution: Question 7
and 
and 
InFe(CO)s, the Fe-C bond possesses
Detailed Solution: Question 8
metal to ligand back bonding in Fe-C bond of the organometallic compound
So it possesses both 
and 
characters.
The crystal field splitting energy for octahedral 
and tetrahedral 
complexes is related as
Detailed Solution: Question 9
Calculate the magnetic moment of 
ion 
.
ion .Detailed Solution: Question 10
For octahedral complex, which of the following 
configurations of metal cation cannot exist in high spin and low spin forms?
Detailed Solution: Question 11
and 
octahedral complexes number of unpaired 
at central metal atom/ion never changes, therefore for such octahedral complexes terms high spin and low spin not used.Which of the following complex ions has electrons that are symmetrically filled in both 
and 
orbitals ?
and orbitals ?Detailed Solution: Question 12
Which of the following statements related to crystal field splitting in octahedral coordination entities is incorrect?
Detailed Solution: Question 13
is a strong field ligand and form low spin complexes thus 
Among the following species the one which causes the highest 
as a ligand is:
Detailed Solution: Question 14
for the ligands. 
The increasing order of crystal field splitting strength of the given ligands is
Detailed Solution: Question 15
Detailed Solution: Question 16
Hybridization 
High or
is an example of 
system of configuration.Which of the following carbonyls will have the strongest 
bond ?
Detailed Solution: Question 17
orbitals of CO ligand (donation of electron density into 
orbitals of 
result in weakening of 
bond ). Hence, the 
bond would be strongest in 
Which of the following does not have a metal carbon bond?
Detailed Solution: Question 18
If the crystal field splitting energy of a tetrahedral complex 
of the type 
is 
, what is the crystal field splitting energy with respect to an octahedral complex, 
?
Detailed Solution: Question 19
of 
is 
, the CFSE of octahedral complex 
will be 
.The 
for 
complex is 
. The 
for 
will be:
Detailed Solution: Question 20
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