CBSE Class 12 Chemistry — Coordination Compounds
All previous year questions from Chapter: Coordination Compounds
5 questions found
2026(5 questions)
- 7
The secondary valency of Co in the complex [Co(NH₃)₅(NO₂)]²⁺ is
1 mark· A· Secondary valency (coordination number) - 19
(a) Write IUPAC names of the following coordination compounds: (2 × 1) (i) [Ag(NH₃)₂] [Ag(CN)₂] (ii) K₃[Fe(C₂O₄)₃] OR (b) (i) Give a chemical test to show that [Co(NH₃)₅SO₄]Cl and [Co(NH₃)₅Cl]SO₄ are ionisation isomers. (2 × 1) (ii) What is meant by the 'Chelate effect'? Give an example.
2 marks· B· IUPAC nomenclature and isomerism of coordination compounds - 32
(a) In octahedral crystal field, energies of which d-orbitals will be raised when ligands approach the central metal atom/ion? Give reason in support of your answer.
2 marks· D· Crystal field splitting of d-orbitals in an octahedral field - 33
(b) Using crystal field theory, write the electronic configuration of central metal atom/ion of the following: (i) [CoF₆]³⁻ (ii) [Co(NH₃)₆]³⁺ [At. No.: ]
1 mark· D· CFT electronic configuration of Co(III) complexes - 34
(c) is paramagnetic while is diamagnetic though both are tetrahedral. Why? [Atomic No.: ] OR (c) Write hybridization and magnetic behaviour of the complex . [Atomic No.: ]
1 mark· D· VBT: magnetic behaviour and hybridisation of tetrahedral/octahedral complexes