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MCQ Questions Class 12 Coordination Compounds with Answers - Set - 4
Question 1:
Ammonia forms the complex ion [Cu(NH3 )4 ]2+ with copper ions in the alkaline solutions but not in acidic solutions. What is the reason for it ?
(a) In acidic solutions hydration protects copper ions
(b) In acidic solutions protons coordinate with ammonia molecules forming NH+4 ions and NH3 molecules are not available
(c) In alkaline solutions insoluble Cu(OH)2 is precipitated which is soluble in excess of any alkali
(d) Copper hydroxide is an amphoteric substance
Correct Answer – (B)
Question 2:
In an octahedral structure, the pair of d-orbitals involved in d2sp 3 hybridisation is
(a) dx2 – y2 ,dz2
(b) dxz ,dx2 – y2
(c) dz2 ,dxz
(d) dxy ,dyz
Correct Answer – (C)
Question 3:
CN- is strong field ligand. This is due to the fact that
(a) it carries negative charge
(b) it is a pseudohalide
(c) it can accept electrons from metal species
(d) it forms high spin complexes with metal species
Correct Answer – (B)
Question 4:
Which of the following complex has zero magnetic moment (spin only)?
(a) [Ni(NH3 )6 ]Cl2
(b) Na3[FeF6]
(c) [Cr(H2O)6]SO4
(d) K4[Fe(CN)6]
Correct Answer – (D)
Question 5:
In which of the following complex ion, the central metal ion is in a state of sp3d2 hybridisation?
(a) [CoF6)]3-
(b) [Co(NH3)6 ]3+
(c) [Fe(CN)6]
(d) [Cr(NH3)6 ]3+
Correct Answer – (A)
MCQ Questions Class 12 Coordination Compounds With Answers
Question 6:
The geometry of Ni(CO)4 and Ni(PPh3)2 Cl2 are
(a) both square planar
(b) tetrahedral and square planar respectively
(c) both tetrahedral
(d) square planar and tetrahedral respectively
Correct Answer – (C)
Question 7:
Considering H2O as weak field ligand, the number of unpaired electrons in [Mn(H2O)6 ]2+ will be
(Atomic number of Mn = 25)
(a) three
(b) five
(c) two
(d) four
Correct Answer – (A)
Question 8:
Among [Ni(CO)4 ]2- , [Ni(CN)4 ]2- and [NiCl4 ]2- species, the hybridisation states of the Ni atom are, respectively (Atomic number of Ni= 28)
(a) sp3, dsp2, dsp2
(b) sp3, dsp2,sp3
(c) sp3, sp3, dsp2
(d) dsp2, sp3, sp
Correct Answer – (B)
Question 9:
Which one of the following has a square planar geometry? (Atomic Number of Fe= 26, Co= 27, Ni= 28, Pt= 78)
(a) [CoCl4 ]2-
(b) [FeCl4 ]2-
(c) [NiCl4 ]2-
(d) [PtCl4 ]2-
Correct Answer – (D)
Question 10:
Which has maximum paramagnetic character?
(a) [Fe(CN)6 ]4-
(b) [Cu(H2O)4 ]2+
(c) [Cu(NH3 )4 ]2+
(d) [Mn(H2O)6 ]2+
Correct Answer – (D)
- NCERT Solutions Class 11 Chemistry Chapter 1 : Some Basic Concepts of Chemistry
- NCERT Solutions Class 11 Chemistry Chapter 2 : Structure Of The Atom
- NCERT Solutions Class 11 Chemistry Chapter 3 : Classification of Elements and Periodicity in Properties
- NCERT Solutions Class 11 Chemistry Chapter 4 : Chemical Bonding and Molecular Structure
- NCERT Solutions Class 11 Chemistry Chapter 5 : States of Matter
- NCERT Solutions Class 11 Chemistry Chapter 6 : Thermodynamics
- NCERT Solutions Class 11 Chemistry Chapter 7 : Equilibrium
- NCERT Solutions Class 11 Chemistry Chapter 8 : Redox Reactions
- NCERT Solutions Class 11 Chemistry Chapter 9 : Hydrogen
- NCERT Solutions Class 11 Chemistry Chapter 10 : The s-Block Elements
- NCERT Solutions Class 11 Chemistry Chapter 11 : The p-Block Elements
- NCERT Solutions Class 11 Chemistry Chapter 12 : Organic Chemistry: Some Basic Principles and Techniques
- NCERT Solutions Class 11 Chemistry Chapter 13 : Hydrocarbons
- NCERT Solutions Class 11 Chemistry Chapter 14 : Environmental Chemistry
