MEDIUM

Earn 100

The magnitude of crystal field stabilisation energy (CFSE) in tetrahedral complexes is considerably less than in the octahedral field because

50% studentsanswered this correctly

Important Questions on Coordination Compounds

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

When concentrated

HCl

is added to aqueous solution of

C o C l_{2}

, its colour changes from reddish pink to deep blue. Which complex ion gives blue colour in reaction?

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

The complex that has highest crystal field splitting energy

(∆)

, is:

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

The octahedral complex of a metal ion

M^{3 +}

with four monodentate ligands

L_{1}, L_{2}, L_{3} and L_{4}

absorb wavelengths in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

Which of the following complex ions has electrons that are symmetrically filled in both

t_{2 g}

and

e_{g}

orbitals?

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

{[F e {(C N)}_{6}]}^{4 -}

and

{[F e {(H_{2} O)}_{6}]}^{2 +}

are of different colours in dilute solutions. Why?

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

What is the correct electronic configuration of the central atom in

K_{4} [F e {(C N)}_{6}]

based on crystal field theroy?

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

In aqueous solution,

{[Co {(H_{2} O)}_{6}]}^{2 +} (X)

reacts with molecular oxygen in the presence of excess

{NH}_{3}

to give a new complex

Y .

The number of unpaired electrons in

X

and

Y

are, respectively

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

Complete removal of both the axial ligands (along the

z - a x i s

) from an octahedral complex leads to which of the following splitting patterns? (relative orbital energies not on scale).

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

The correct increasing order for the wavelengths of absorption in the visible region for the complexes of

{Co}^{3 +}

is:

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

Pick out the correct statement with respect to

[Mn (CN)_{6}]^{3 -} .

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

The calculated spin-only magnetic moments

(B M)

of the anionic and cationic species out of

{[Fe {(H_{2} O)}_{6}]}^{+ 2}

and

{[Fe {(CN)}_{6}]}^{4 -}

respectively, are:

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

The correct increasing order of trans-effect of the following species is

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

The degenerate orbitals of

{[C r {(H_{2} O)}_{6}]}^{3 +}

are

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

Identify the correct trend given below:

(Atomic No. = Ti : 22, Cr : 24 and Mo : 42)

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

The complex ion that will lose its crystal field stabilization energy upon oxidation of metal to

+ 3

state is:

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

Three complexes,

{[C o C l {(N H_{3})}_{5}]}^{2 +} (I), {[C o {(N H_{3})}_{5} H_{2} O]}^{3 +} (I I)

and

{[C o {(N H_{3})}_{6}]}^{3 +} (I I I)

absorb light in the visible region. The correct order of the wavelength of light absorbed by them is:

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

The correct order of the spin –only magnetic moment of metal ions in the following low-spin complexes,

{[V {(C N)}_{6}]}^{4 -}, {[F e {(C N)}_{6}]}^{4 -}, {[R u {(N H_{3})}_{6}]}^{3 +}

and

{[C r {(N H_{3})}_{6}]}^{2 +},

is:

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

The energies of

d_{xy} and d_{z}^{2}

orbitals in octahedral and tetrahedral transition metal complexes are such that

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

Jahn-Teller effect is not observed in high spin complexes of

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory (CFT)

Homoleptic octahedral complexes of a metal ion

' M^{3 +}'

with three monodentate ligands

L_{1}, L_{2} a n d L_{3}

absorb wavelengths in the region of green, blue and red respectively. The increasing order of the ligand strength is:

The magnitude of crystal field stabilisation energy (CFSE) in tetrahedral complexes is considerably less than in the octahedral field because

Important Questions on Coordination Compounds

Learn and Prepare for any exam you want !