Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET202422 May 2024Evening ShiftChemistryCoordination CompoundsActual

Which complex among the following is most paramagnetic?

Options

  1. A[ Co ( NH ₃ )₆ ]²⁺
  2. B[ Co ( NH ₃ )₆ ]³⁺
  3. C[ Co ( H ₂ O )₆ ]²⁺
  4. D[ Co ( H ₂ O )₆ ]³⁺

Correct answer

C. [ Co ( H ₂ O )₆ ]²⁺

Step-by-step solution

array |l|c|c|c|c| Complex & array c Metal oxidation state array & EC & array c Nature of ligand array & array c No. of unpaired electron array [ Co ( NH ₃ )₆ ]²⁺ & Co ²⁺ & 3 ~d ^7 & Strong & 1 [ Co ( NH ₃ )₆ ]³⁺ & Co ³⁺ & 3 ~d ^6 & Strong & 0 [ Co ( H ₂ O )₆ ]³⁺ & Co ²⁺ & 3 ~d ^7 & Weak & 3 [ Co ( H ₂ O )₆ ]³⁺ & co ³⁺ & 3 ~d ^6 & Strong & 0 array So, 'c' is the correct option. but offical answer given is d.

Practice Coordination Compounds on Quantrex Academy →

More from Coordination Compounds

Identify the complex which exhibits all 3 characteristics; paramagnetic; high spin configuration; octahedral geometry 2026Which one of the following complex-isomerism pair matches correctly? 2026Match the Coordination compounds in Column I with the type of stereoisomerism given in Column II exhibited by them. Column I Column II A. [ Pt ( NH ₃)₂ Cl ₂] P. fac-mer B. Ni [( NH 2026The Crystal Field Stabilisation energy of (i) [ CoF ₆]³⁻ and (ii) [ Fe ( H ₂ O )₆]³⁺ are ----- and ------- respectively. 2026Which one of the following octahedral complexes has the highest spin-only magnetic moment? 2026Metal-ligand -bond formation in Mn ₂( CO )₁₀ and [ MnO ₄]^- requires electron-pair donation between metal and ligand orbitals. Which one of the following represents the direction o 2026Which of the following is the most stable complex ion? 2026How many ions per molecule are produced from the complex [ Co(NH ₃ ) ₆] Cl ₂ in solution? 2026 Full Coordination Compounds list All AP EAMCET PYQs