JEE Chemistry Coordination Compounds MCQs Set B

Question:

• a) ionization isomers
• b) coordination isomers
• c) linkage isomers
• d) optical isomers

Answer: ionization isomers

Question: Which one of the following will not show geometrical isomerism

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: A similarity between optical and geometrical isomerism is that

• a) both are included in stereoisomerism
• b) they have no similarity
• c) if in a compound one is present then so is the other
• d) each gives equal number of isomers for a given compound

Answer: both are included in stereoisomerism

Question: The type of isomerism present in nitropentaamminechromium (III) chloride is

• a) linkage
• b) polymerization
• c) ionization
• d) optical

Answer: linkage

Question:

• a) solvate isomerism
• b) coordination isomerism
• c) linkage isomerism
• d) ionisation isomerism

Answer: solvate isomerism

Question:

• a) Meridional
• b) Facial
• c) Cis
• d) None of these

Answer:  Meridional

Question:

• a) linkage isomers
• b) ionisation isomers
• c) coordination isomers
• d) geometrical isomers

Answer: linkage isomers

Question: The geometry of Ni(CO)₄ and Ni(PPh₃)₂Cl₂ are

• a) both tetrahedral
• b) None of these
• c) tetrahedral and square planar
• d) both square planar

Answer: both tetrahedral

Question:

• a) 3
• b) 1
• c) 4
• d) 2

Answer: 3

Question: Which of the following facts about the complex [Cr(NH₃)₆]Cl₃ is wrong?

• a) The complex is an outer orbital complex
• b) The complex gives white precipitate with silver nitrate solution.
• c) The complex is paramagnetic
• d) The complex involves d²sp³ hybridisation and is octahedral in shape.

Answer: The complex is an outer orbital complex

Question: Which of the following statements is correct ?

(Atomic number of Ni = 28)

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which of the following species represent the example of dsp² - hybridisation ?

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Which one of the following will show paramagnetism corresponding to 2 unpaired electrons? (Atomic numbers : Ni = 28, Fe = 26)

• a)

  

• b)

  

• c) Both
• d) None of these

Answer:

Question: Atomic number of Cr and Fe are respectively 25 and 26, which of the following is paramagnetic?

• a) [Cr(NH₃)₆]⁺³
• b) [Fe(CO)₅]
• c) [Cr(CO)₆]
• d) None of these

Answer: [Cr(NH₃)₆]⁺³

Question: CN^– is a strong field ligand. This is due to the fact that

• a) it is a pseudohalide
• b) it can accept electrons from metal species
• c) it forms high spin complexes with metal species
• d) it carries negative charge

Answer: it is a pseudohalide

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

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: [Sc(H₂O)₆]³⁺ ion is

• a) colourless and diamagnetic
• b) coloured and octahedral
• c) colourless and paramagnetic
• d) coloured and paramagnetic

Answer: colourless and diamagnetic

Question: Which has maximum paramagnetic nature ?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: The compound which is not coloured is

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which of the following complexes exhibits the highest paramagnetic behaviour ?

• a) [Co(ox)₂(OH)₂]^2–
• b) [Ti(NH₃)₆]³⁺
• c) Both
• d) None of these

Answer: [Co(ox)₂(OH)₂]^2–

Question: Which of the following complex ion is not expected to absorb visible light

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Of the following complex ions, which is diamagnetic in nature?

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour ?

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question:

• a) (i) and (iii)
• b) (i) and (iv)
• c) (ii) and (iii)
• d) (i) and (ii)

Answer: (i) and (iii)

Question:

• a) (i) and (iii)
• b) (i) and (iv)
• c) (ii) and (iii)
• d) (ii) and (iv)

Answer: (i) and (iii)

Question: Which of these statements about [Co(CN)₆]^3– is true ?

• a) [Co(CN)₆]^3– has no unpaired electrons and will be in a low-spin configuration.
• b) [Co(CN)₆]^3– has no unpaired electrons and will be in a high-spin configurtion.
• c) Both
• d) None of these

Answer: [Co(CN)₆]^3– has no unpaired electrons and will be in a low-spin configuration.

Question: The complex ion which has highest magnetic moment among the following is

• a) [CoF₆]^3–
• b) [Co(NH₃)₆]³⁺
• c) [Ni(CN)₄]^2–
• d) None of these

Answer: [CoF₆]^3–

Question: Which of the following complex ions is diamagnetic?

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Which of the following has square planar structure?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:

• a) Both
• b) NH₃ being a strong ligand results into pairing of 3d orbital electrons in Co³⁺
• c) F^– being a weak ligand cannot cause the pairing of electrons present in 3d orbital of Co³⁺.
• d) None of these

Answer: Both

Question: Which of the following statements is incorrect?

• a)

  

• b)

  

• c) Both
• d) None of these

Answer:

Question:

• a) B and C
• b) C
• c) A and C
• d) B

Answer: B and C

Question: Which of the following are inner orbital complex (i.e., involving d²sp³ hybridisation) and is paramagnetic in nature?

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Which of the following is the limitation of valence bond theory?

• a) All of these
• b) It does not explain the colour exhibited by coordination compounds
• c) It does not give quantitative interpretation of magnetic data.
• d) It does not distinguish between weak and strong ligands

Answer: All of these

Question: Which complex of Co²⁺ will have the weakest crystal field splitting –

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: The crystal field stabilization energy (CFSE) is the highest for

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question:

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Among the ligands NH₃, en, CN^– and CO the correct order of their increasing field strength, is

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Among the following complexes the one which shows zero crystal field stabilization energy (CFSE):

• a) [Fe(H₂O)₆]³⁺
• b) [Co(H₂O)₆]³⁺
• c) [Co(H₂O)₆]²⁺
• d) None of these

Answer: [Fe(H₂O)₆]³⁺

Question:

• a)

  

• b)

  

• c)

  

• d)

  

Answer: