NEET Chemistry Coordination Compounds MCQs Set B

Question:  The total number of electrons donated by ligands to platinum ion in [Pt(en)₂Cl₂] is

• a) 8
• b) 10
• c) 12
• d) 14

Answer: 12

Question:  The IUPAC name of [Ni(CN)₄]^2– is

• a) Tetracyanonickel (II) ion
• b) Tetracyanonickelate (II) ion
• c) Tetracyanonickel (0) ion
• d) Tetracyanonickelate (0) ion

Answer: Tetracyanonickelate (II) ion

Question:  Out of following which ligand is a π acid ligand? 

• a) CO
• b) NH₃
• c) Cl^–
• d) H₂O

Answer: CO

Question: Which of the following is not an ambidentate ligand?

• a) CN^–
• b)

  

• c) SCN^–
• d) NH₃

Answer:  NH₃

Question:  Primary and secondary valencies of Cu in [Cu(NH₃)₄]SO₄ is

• a) 4, 4
• b) 2, 4
• c) 4, 1
• d) 4, 2

Answer: 2, 4

Question: Oxidation number of platinum in cis-platin

• a) Zero
• b) +2
• c) +4
• d) +6

Answer: +2

Question:  IUPAC name of K[BF₄]

• a) Potassium tetrafluoroborate
• b) Tetrafluoroboron (III) potassium
• c) Potassiumtetrafluoridoborate (III)
• d) Tetrafluoridoboron (III) potassium

Answer: Potassiumtetrafluoridoborate (III)

Question:  Aq. solution of KCl.MgCl₂.6H₂O will give test of

• a) K⁺ and Mg²⁺ only
• b) K⁺ and Cl^– only 
• c) K⁺, Mg²⁺ and Cl^– 
• d) Mg²⁺ and H₂O only

Answer:  K⁺, Mg²⁺ and Cl^– 

Question:  Aqueous solution of CoCl_3.6NH₃ upon addition with AgNO₃ produces 3 moles white precipitate. Primary and secondary valency of metal in this complex is

• a) 3, 6
• b) 2, 6
• c) 3, 3
• d) 6, 4

Answer: 3, 6

Question: Which of the following complex is homoleptic?

• a) H₂[PtCl₆] 
• b) Li[AlH₄]
• c) [Ni(CO)₄]  
• d) All of these

Answer: All of these

Question: Structural formula of tetraaquadichloridochromium(III) chloride

• a) [(H₂O)₄Cl₂Cr]Cl₂
• b) [Cl₂(H₂O)₄Cr]Cl₃
• c) [Cr(H₂O)₄Cl₂]Cl
• d) [Cr(H₂O)₄Cl₃]

Answer:  [Cr(H₂O)₄Cl₂]Cl

Question: Which of the following is not a polydentate ligand?

• a) Oxalate ion
• b) Ethylenediamine
• c) Thiocyanato
• d) EDTA

Answer: Thiocyanato

Question:  The complex [Cr(H₂O)₅Cl]Br and [Cr(H₂O)₅Br]Cl shows

• a) Linkage isomerism
• b) Ionisation isomerism
• c) Hydrate isomerism
• d) Co-ordination isomerism

Answer: Ionisation isomerism

Question: Oxidation number of platinum in cis-platin

• a) Zero
• b) +2
• c) +4
• d) +6

Answer: +2

Question: Which of the following octahedral complexes do not show geometrical isomerism?

• a) [Co(NH₃)₃Cl₃] 
• b) [PtCl₂(NH₃)₄]
• c) [Pt(NH₃)₂Cl₂]
• d) [Co(en)₃]³⁺

Answer:  [Co(en)₃]³⁺

Question: Coordination isomerism exhibited by

• a) [Cr(en)₂Cl₂]NO₂ 
• b) [Co(NH₃)₅Br]SO₄
• c) [Pt(NH₃)₄] [CuCl₄] 
• d) [Co(NH₃)₅Cl]Cl₂

Answer:  [Pt(NH₃)₄] [CuCl₄] 

Question: Which one of the following complexes will have six isomers?

• a) [Co(en)NH₃Cl₂]Cl  
• b) [Cr(H₂O)₄Cl₂]Cl
• c) [Co(ox)₃]^3– 
• d) [Co(en)₂Br₂]Cl

Answer:  [Co(en)₂Br₂]Cl

Question:  How many isomers are possible in [Cr(en)₂Br₂]?

• a) 2
• b) 3
• c) 6
• d) 1

Answer: 3

Question: The hybridisation of Ni in [Ni(CO)₄] is

• a) sp³ 
• b) dsp²
• c) sp²
• d) sp³d

Answer:  sp³ 

Question: Which of the following is/are inner orbital complex?

• a) [Fe(CN)₆]^4– 
• b) [Cr(NH₃)₆]³⁺
• c) [Mn(CN)₆]^3– 
• d) All of these

Answer: All of these

Question:  Number of unpaired electrons present in [Ni(H₂O)₆]²⁺

• a) Two
• b) One
• c) Four
• d) Three

Answer: Two

Question: The spin magnetic moment of iron in K₃[Fe(CN)₆]

• a) √3 BM
• b) √5 BM 
• c) √15 BM
• d) √24 BM

Answer:  √3 BM

Question: Which one of the following is paramagnetic in nature?

• a) Ni(CO)₄
• b) [Ni(CN)₄]^2– 
• c) K₄[Fe(CN)₆]
• d) [FeF₆]^4–

Answer:  [FeF₆]^4–

Question: Which of the following does not show optical activity?

• a) [Co(NH₃)₄Cl₂]  
• b) [Cr(ox)₃]^3–
• c) [Co(ox)₂(NH₃)₂]Cl  
• d) [Co(en)(NH₃)₂(H₂O)₂]Cl₂

Answer: [Co(NH₃)₄Cl₂]  

Question:  [Fe(H₂O)₆]³⁺ and [Fe(CN)₆]^3– differ in

• a) Oxidation number
• b) Coordination number
• c) Structure
• d) Magnetic nature

Answer: Magnetic nature

Question:  The spin only magnetic moment of [MnBr₄]^2– is 5.9 B.M. Geometry of the complex ion is

• a) Tetrahedral
• b) Octahedral
• c) Square planar
• d) Pentagonal pyramidal

Answer: Tetrahedral

Question: Which of the following statements are incorrect?

• a) If Δ₀< P, high spin state is more stable
• b) NO₂ is a strong ligand
• c) Colour of a complex depends upon nature of metal ion only
• d) Δ₀> Δ_t

Answer: Colour of a complex depends upon nature of metal ion only

Question: According to crystal field theory, five d-orbitals of an octahedral complex split to give

• a) Two orbitals with lower energy and three orbitals with higher energy
• b) Three orbitals with lower energy and two orbitals with higher energy
• c) One orbital with lower energy and four orbitals with higher energy
• d) Four orbitals with lower energy and one orbital with higher energy

Answer: Three orbitals with lower energy and two orbitals with higher energy

Question: Which of the following complex is most stable?

• a) [M(NH₃)₆]²⁺
• b) [M(NH₃)₆]³⁺
• c) [Men₂(NH₃)₂]³⁺
• d) [M(en)₃]³⁺

Answer:  [M(en)₃]³⁺

Question: In the formation of octahedral complex, ligands approach towards _______ and _______ orbital of central metal.

• a) d_xy,d_{x²- y²}
• b) d_{x²- y²},d_z²
• c) d_xy, d_yz
• d) d_z², d_xz 

Answer:  d_{x²- y²},d_z²

Question:  Which reagent can be used to identify Ni²⁺ ion?

• a) Resorcinol
• b) Dimethyl glyoxime
• c) Diphenyl benzidine
• d) Potassium ferrocyanide

Answer: Dimethyl glyoxime

Question: Which of the following is not organometallic complex?

• a) Grignard reagent
• b) Ferrocene
• c) Trans-platin
• d) Diethyl zinc

Answer: Trans-platin

Question: Stability of the complex depends on

• a) Oxidation state
• b) Nature of ligand
• c) Geometry of complex
• d) All of these

Answer: All of these

Question:  π bonding is not involved in

• a) Ferrocene
• b) Dibenzene chromium
• c) Zeise’s salt
• d) Grignard reagent

Answer: Grignard reagent

Question: Which of the following will show optical activity?

• a)

  

• b)

  

• c) [Co(NH₃)₆]³⁺
• d)

  

Answer:

Question: Which is a diamagnetic complex?

• a) [Fe(H₂O)₆]³⁺ 
• b) [Fe(H₂O)₆]²⁺
• c) [Fe(CN)₆]^3–
• d) [Fe(CN)₆]^4–

Answer:  [Fe(CN)₆]^4–

Question:  The hybridization of 'Cr' in the complex [Cr(NO₂)₄ (NH₃)₂]^- is

• a) sp³d² 
• b) sp³d
• c) d²sp³
• d) sp³

Answer:  d²sp³

Question:  IUPAC name of H₂[PtCl₆] is

• a) Dihydrogen hexachloridoplatinum (IV)
• b) Hexachloridoplatinic (IV) acid
• c) Dihydrogen hexachloridoplatinic (IV) acid
• d) Hexachloridoplatinum (IV) acid

Answer: Hexachloridoplatinic (IV) acid

Question:  The geometry of [Ni(CO)₄] and [PdCl₄]^2– respectively are

• a) Both are tetrahedral
• b) Both are square planar
• c) Square planar and tetrahedral
• d) Tetrahedral and square planar

Answer: Tetrahedral and square planar

Question:  Write the increasing order of the value is CFSES (Δ₀) for the following species

I. [Co(NH₃)₆]³⁺

II. [Rh(NH₃)₆]³⁺

III. [Ir(NH₃)₆]³⁺

• a) III < II < I
• b) I < II < III
• c) II < I < III
• d) I < III < II

Answer: I < II < III

Question: Which of the following is correct statement?

• a) [Ti(H₂O)₆]³⁺ is coloured complex
• b) [Si(H₂O)₆]⁴⁺ is colourless complex
• c) d - d transition is not possible in [Si(H₂O)₆]⁴⁺ complex
• d) All of these

Answer: All of these

Question: Which of the following will have greatest molar conductance at infinite dilution?

• a) [Pt(NH₃)₅Cl]Cl₃
• b) [Pt(NH₃)₄Cl₂]Cl₂
• c) [Pt(NH₃)₂Cl₄]  
• d) [Pt(NH₃)₆]Cl₄

Answer:  [Pt(NH₃)₆]Cl₄

Question: Which of the following is the high spin complex?

• a) [Cr(gly)₃]
• b) [CoBr₂Cl₂(SCN)₂]^3–
• c) [Fe(CN)₆]^3– 
• d) Na[PtBrCl(NO₂)₂(NH₃)₂]

Answer:  [CoBr₂Cl₂(SCN)₂]^3–

Question:  The coordination number and magnetic moment of the complex [Cr(C₂O₄)₂(NH₃)₂]^– respectively is

• a) 6, 3.87 BM
• b) 4, 3.87 BM
• c) 6, 3.46 BM
• d) 4, 1.73 BM

Answer: 6, 3.87 BM

Question: Number of geometrical isomers possible for [MABCDEF] is

• a) 6
• b) 10
• c) 15
• d) 12

Answer: 15

Question: How many optical isomers are possible for [MABCD]?

• a) 1
• b) 2
• c) 3
• d) Zero

Answer: Zero

Question:  [Ni(gly)₂] shows two stereoisomers. Those are

• a) Geometrical
• b) Optical
• c) Does not show isomerism
• d) Both (1) & (2)

Answer: Optical

Question:  Naming of ligand in [M(en)₂]ⁿ⁺ starts with

• a) Di
• b) Bi
• c) Bis
• d) Any of these

Answer: Bis

Question: Which of the following has primary valency “2”?

• a) [Co(NH₃)₅Cl]Cl
• b) [Co(NH₃)₄Cl₂]Cl
• c) [Co(NH₃)₃Cl₃]
• d) [Co(H₂O)₄Cl₂]Cl

Answer:  [Co(NH₃)₅Cl]Cl

Question:  If the value of C.F.S.E. for “Ni” is Δ₀ then it is for Pd should be

• a) 1.1Δ₀
• b) 0.5 Δ₀
• c) 1.5 Δ₀
• d) 2 Δ₀

Answer: 1.5 Δ₀

Question: Ligand to form a complex which is used to treat hard water

• a) NH₃
• b) ox
• c) en
• d) EDTA

Answer: EDTA

Question: Which of the following is not bidentate ligand?

• a) acac
• b) ox
• c) en
• d) dien

Answer: dien

Question: Which of the following is flexidentate?

• a) CO
• b) en
• c) EDTA
• d) Cl^–

Answer: EDTA

Question: The value of ‘spin only’ magnetic moment, follows the correct order?

• a) [Fe(CN)₆]^4– > [CoCl₄]^2– > [MnCl₄]^2–
• b) [MnCl₄]^2– > [Fe(CN)₆]^4– > [CoCl₄]^2–
• c) [Fe(CN)₆]^4– > [MnCl₄]^2– > [CoCl₄]^2–
• d) [MnCl₄]^2– > [CoCl₄]^2– > [Fe(CN)₆]^4–

Answer:  [MnCl₄]^2– > [CoCl₄]^2– > [Fe(CN)₆]^4–

Question: How many hydrogen bonded water molecules are present in blue vitriol?

• a) Zero
• b) One
• c) Four
• d) Five

Answer: One

Question:  If  Δ₀ is the crystal field stabilisation energy of a ligand and P is the energy required for electron pairing in an orbital, then ligand is called weak ligand if

• a) Δ₀> P
• b) Δ₀< P 
• c) Δ₀= P 
• d) Unpredictable

Answer:  Δ₀< P 

Question: The complex compound bearing square planar geometry is

• a) Ni(CO)₄
• b) [Ni(CN)₄]^2–
• c) [Mn(CN)₆]3–
• d) [MnCl₄]^2–

Answer:  [Ni(CN)₄]^2–

Question: The complex compound having maximum magnetic moment is

• a) [CoF₆]^3– 
• b) [Cr(NH₃)₆]³⁺
• c) [FeF₆]^3– 
• d) [Mn(CN)₆]^4–

Answer: [FeF₆]^3– 

Question:  Which of the following is not π-acid ligand?

• a) CO
• b) F^– 
• c) C₂H₄
• d) NO⁺

Answer:  F^– 

Question: The complex compound in which metal is not present in zero oxidation state?

• a) Mn₂(CO)₁₀
• b) [Ni(CO)₄]
• c) [Cr(C₆H₆)₂]
• d) K[PtCl₃(C₂H₄)]

Answer:  K[PtCl₃(C₂H₄)]