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What are weak field ligands?

Important Questions on Coordination Compounds

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

Which of the following ions has the lowest magnetic moment value?

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The spin - only magnetic moments of

{[F e {(N H_{3})}_{6}]}^{3 +} a n d {[F e F_{6}]}^{3 -}

in BM are respectively,

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

{[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

The molecule in which hybrid

MOs

involve only one d-orbital of the central atom is :

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The geometry and the number of unpaired electron(s) of

{[{MnBr}_{4}]}^{2 -},

respectively, are

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

Among the complexes of Ni listed below, the following is the only correct statement

I - $[Ni (CO)_{4}]$

II - ${[Ni (CN)_{4}]}^{- 2}$

III - ${[Ni ({Cl}_{4})]}^{- 2}$

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

Which of the following is an outer orbital complex?

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The complex having the highest spin only magnetic moment is

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The hybridisation of

Fe

K_{3} [Fe (CN)_{6}]

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

In Wilkinson's catalyst, the hybridization of central metal ion and its shape are respectively:

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The type of

d

orbitals which are used in hybridization by the central metal in

[Fe {(H_{2} O)}_{6}] {SO}_{4}

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

Which of the following is correct in the case of the

{[{NiCl}_{4}]}^{2 -}

complex?

MEDIUM

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

[Ni (CN)_{4}]^{2 -}

and

[Ni (CO)_{4}]

have

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

Match the following:

Column – I	Column - II
$A . {sp}^{3}$	$(i) {[Co {({NH}_{3})}_{6}]}^{3 +}$
$B . {dsp}^{2}$	$(ii) [Ni {(CO)}_{4}]$
$C . {sp}^{3} d^{2}$	$(iii) [Pt {({NH}_{3})}_{2} {Cl}_{2}]$
$D . d^{2} {sp}^{3}$	$(iv) {[{CoF}_{6}]}^{3 -}$

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

Which of the following can form square planar complex?

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The value of 'spin only' magnetic moment for one of the following configurations is

2.84 BM

. According to valence bond theory, the correct one is:

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

Which of the following pair(s) have the same magnetic moment (spin only)?

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

What is the hybridization of

Fe

in the brown ring formation?

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

Which one of the following complexes would exhibit the lowest value of paramagnetic behaviour?

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

Using valence bond theory, explain the following in relation to the complexes given below:

${[Mn {(CN)}_{6}]}^{3 -}, {[Co {({NH}_{3})}_{6}]}^{3 +}, {[Cr {(H_{2} O)}_{6}]}^{3 +}, {[{FeCl}_{6}]}^{4 -}$

Specify whether they are inner or outer orbital complexes.

What are weak field ligands?

Important Questions on Coordination Compounds

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