Ligand Field Theory MCQs for NET & GATE - Download PDF

Ligand Field Theory (LFT)

MCQs for CSIR UGC NET & GATE

Coordination Compounds
Topic wise Assignment

QUIZ              PDF

Q1. Among (CH₃)₃P, NO⁺, CN^-, I₃^- ligands, the one which is not a π acceptor ligand is
(a) I₃^-
(b) CN^-
(c) NO⁺
(d) (CH₃)₃P

Q2. The symmetry required for the ligand group orbitals (LGO) for the π^- base ligands to have π^- interactions with the metal d orbitals in an octahedral geometry is
(a) a_1g
(b) b_2g
(c) e_g
(d) t_2g

Q3. Stabilization of the highest oxidation states of transition metals by strong electronegative ligands due to
(a) dπ(L) → dπ(M) bonding
(b) pπ(L) → dπ(M) bonding
(c) dπ(M) → pπ(L) bonding
(d) dπ(M) → dπ(L) bonding

Q4. On molecular orbital treatment of [Mn(CO)₆]⁺, the symmetry of the LGO that is not sigma bonding, is
(a) A_1g
(b) T_1g
(c) T_1u
(d) E_g

Q5. According to CFT, Ni²⁺ can have two unpaired electrons in

[NET June 2011]

(a) Octahedral geometry only
(b) Square Planer geometry only
(c) Tetrahedral geometry only
(d) Both Tetrahedral geometry and Octahedral geometry

Q6. As a ligand, Cl^- is

[NET June 2012]

(a) σ- donor
(b) π- donor
(c) both σ & π donor
(d) σ donor and σ acceptor

Q7. dπ-dπ and dπ-π* types of donations of electrons from metal to ligand is shown by
(a) Alkanes & Halides
(b) R₃P and CN^-
(c) Halides and CN^-
(d) CN^- and R₃P

Q8. The orders of reactivity of ligands, NMe₃, PMe₃ and CO with complexes MeTiCl₃ and (CO)₅Mo(thf) are
(a) CO>PMe₃>NMe₃ and CO>NMe₃>PMe₃
(b) PMe₃>CO>NMe₃ and NMe₃>CO>PMe₃
(c) NMe₃>PMe₃>CO and CO>PMe₃>NMe₃
(d) NMe₃>CO>PMe₃ and PMe₃>NMe₃>CO

Q9. Identify the order representing π-acidity of the following ligands

[NET June 2013]

C₂F₄, Net₃, CO and C₂H₄
(a) CO<C₂F₄<C₂H₄<NEt₃
(b) C₂F₄<C₂H₄<NEt₃<CO
(c) CO<NEt₃<CO<C₂F₄
(d) NEt₃<C₂H₄<C₂F₄<CO

Q10. As per ligan field theory, which of the following molecules can be considered as most strong field ligand?
(a) carbon monoxide
(b) water
(c) ammonia
(d) triphenyl phosphine

Answer Key

Q1.a Q2.d Q3.b Q4.b Q5.d
Q6.c Q7.b Q8.c Q9.d Q10.a

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