NEETChemistryCoordination CompoundsMCQ+4 / −1
The d electron configurations of Cr2+, Mn2+, Fe2+ and Ni2+ are 3d4, 3d5, 3d6 and 3d8 respectively. Which one of the following aqua complexes will exhibit the minimum paramagnetic behaviour?
(At. No. Cr = 24, Mn = 25, Fe = 26, Ni = 28)
(At. No. Cr = 24, Mn = 25, Fe = 26, Ni = 28)
- A[Fe(H2O)6]2+
- B[Ni(H2O)6]2+
- C[Cr(H2O)6]2+
- D[Mn(H2O)6]2+
View written solutionFree
Correct answer: B
Cr2+ = 3d4 (4 unpaired electrons)
Mn2+ = 3d5 (5 unpaired electrons)
Fe2+ = 3d6 (4 unpaired electrons)
Ni2+ = 3d8 (2 unpaired electrons)
Thus, [Ni(H2O)6]2+ exhibit minimum paramagnetic behaviour.
Greater the number of unpaired electrons, higher is the paramagnetism. Hence Ni2+ will exhibit the minimum paramagnetic behaviour.
More from Coordination Compounds
- [Cr(H2O)6]Cl3 (At. no. of Cr = 24) has a magnetic momen of 3.83 B.M. The correct distribution of 3d electrons in the chromium of the complex is2006 · MCQ
- [Co(NH3)4(NO2)2]Cl exhibits2006 · MCQ
- Which one of the following is an inner orbital complex as well as diamagnetic in behaviour?2005 · MCQ
- Which one of the following is expected to exhibit optical isomerism? (en = ethylenediamine)2005 · MCQ
- CN is a strong field ligand. This is due to the fact that2004 · MCQ
- In an octahedral structure, the pair of orbitals involved in d2sp3 hybridisation is2004 · MCQ
- Which of the following does not have a metal carbon bond?2004 · MCQ
- Which of the following is considered to be an anticancer species?2004 · MCQ