The ion containing maximum number of unpaired electrons is (A) Fe2+ (B) Fe3+ (C) Co2+ (D) Co3+. The respective oxidation number and coordination number of cobalt in [Co(NH3)4(H2O)(... The ion containing maximum number of unpaired electrons is (A) Fe2+ (B) Fe3+ (C) Co2+ (D) Co3+. The respective oxidation number and coordination number of cobalt in [Co(NH3)4(H2O)(Br)(NO2)]2- are (A) +3 and 4 (B) +3 and 6 (C) +2 and 4 (D) +2 and 5. Polystyrene can be classified as: (A) addition polymer or thermoplastic polymer (B) co-polymer or fibers (C) condensation polymer (D) condensation polymer.
Understand the Problem
The question is asking about the identification of the ion with the maximum number of unpaired electrons, the oxidation and coordination numbers of cobalt in a specific complex, and the classification of polystyrene.
Answer
Co2+, +3 and 6, addition or thermoplastic polymer.
The ion containing maximum number of unpaired electrons is Co2+. The oxidation number and coordination number of cobalt in [Co(NH3)4(H2O)(Br)(NO2)]2- are +3 and 6. Polystyrene is classified as an addition polymer or thermoplastic polymer.
Answer for screen readers
The ion containing maximum number of unpaired electrons is Co2+. The oxidation number and coordination number of cobalt in [Co(NH3)4(H2O)(Br)(NO2)]2- are +3 and 6. Polystyrene is classified as an addition polymer or thermoplastic polymer.
More Information
Co2+ has 5 unpaired electrons. [Co(NH3)4(H2O)(Br)(NO2)]2- has an oxidation state of +3 and a coordination number of 6 because it has six ligands. Polystyrene is an addition polymer and often used as a thermoplastic.
Tips
A common mistake is miscounting the number of unpaired electrons in the d-orbitals of ions.
Sources
- Has the maximum number of unpaired electrons - Study - homework.study.com
- High Spin and Low Spin Complexes - Chemistry LibreTexts - chem.libretexts.org
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