Coordination Chemistry

What is the ligand in both hemoglobin and chlorophyll?

• Ammonia
  

• 
  Porphyrin
  

• 
  EDTA
  
  

• Oxine
  

The complex of EDTA with Ca²⁺ is used to estimate

• Acidity
  
  

• DO
  

• 
  BOD
  
  

• 
  Water hardness
  
  

Which indicator is used in EDTA titration?

• 
  Phenolphthalein
  

• Eriochrome Black T

• Methyl orange
  

• Diphenylamine

Which isomerism is shown by [Co(NH₃)₅(NO₂)]Cl₂ and [Co(NH₃)₅(ONO)]Cl₂?

• Geometrical
  

• 
  Optical
  

• Linkage
  

• 
  Ionisation

Which orbital set lies higher in tetrahedral field?

• e

• t₂

• e_g

• t_2g

Which complex is likely to be colorless?

• [Ti(H₂O)₆]³⁺
  

• [Cu(H₂O)₆]²⁺
  
  

• [Zn(H₂O)₆]²⁺
  

• [Fe(CN)₆]³⁻
  

Which ligand would likely lead to a low-spin complex?

• Cl⁻
  

• H₂O
  

• NH₃
  

• CN⁻

Which of the following complexes obeys the EAN rule?

• [Cr(NH₃​)₆​]³⁺
  

• [Fe(CN)₆​]³⁻

• [Ni(CO)₄​]

• [Co(NH_3​)_6​]³⁺

The geometry of [Ni(CN)₄]²⁻ is

• Tetrahedral
  
  

• Octahedral

• Square planar

• Trigonal bipyramidal

Which of the following correctly represents the order in the spectrochemical series (from weak to strong field ligand)?

• CN⁻ < H₂O < Cl⁻ < NH₃
  

• I⁻ < Br⁻ < H₂O < CN⁻

• NH₃ < CN⁻ < H₂O < Cl⁻

• CN⁻ < NH₃ < H₂O < Cl⁻