General
✓✗Which of the following complex ions is expected to absorb visible light? (At. Nos. Zn = 30, Sc = 21, Ti = 22, Cr = 24)
- [Sc(H2O)3(NH3)3]3+
- [Cr(NH3)6]3+
- [Ti(en)2(NH3)2]4+
- [Zn(NH3)6]2+
General
✓✗The CFSE of a d8 ion in an octahedral field (ignoring pairing energy) is
- 0
- −0.8 Δo
- −2.4 Δo
- −1.2 Δo
General
✓✗How many isomers does the square planar complex [Pt(en)Cl2] have?
- 1
- 3
- 2
- 0 (it cannot exist)
General
✓✗The correct increasing order of crystal field splitting caused by the ligands is
- NH3 < H2O < en < CN−
- H2O < en < NH3 < CN−
- H2O < NH3 < en < CN−
- CN− < en < NH3 < H2O
General
✓✗Out of TiF62−, CoF63−, Cu2Cl2 and NiCl42− (Z of Ti = 22, Co = 27, Cu = 29, Ni = 28), the colourless species are
- CoF63− and NiCl42−
- TiF62− and CoF63−
- Cu2Cl2 and NiCl42−
- TiF62− and Cu2Cl2
General
✓✗Among equimolar aqueous solutions of the following, which has the lowest electrical conductance?
- [Pt(NH3)3Cl]Cl
- [Pt(NH3)2Cl2]
- [Pt(NH3)4]Cl2
- K2[PtCl4]
General
✓✗Which types of isomerism can [Co(NH3)5(NO2)]Cl2 show?
- Optical and ionisation isomerism
- Geometrical and optical isomerism
- Linkage and geometrical isomerism
- Linkage and ionisation isomerism only
General
✓✗The crystal field stabilisation energy for a high spin d4 octahedral complex is
- −1.6 Δo + P
- −1.2 Δo
- −1.8 Δo
- −0.6 Δo
General
✓✗Which of the following is a limitation of valence bond theory?
- It cannot predict geometry
- It cannot explain the magnetic behaviour of any complex
- It does not explain the colour of coordination compounds
- It does not use hybridisation
General
✓✗Assertion: [CoCl4]2− is blue whereas [Co(H2O)6]2+ is pink.
Reason: The tetrahedral complex has a smaller crystal field splitting and absorbs light of longer wavelength.
Reason: The tetrahedral complex has a smaller crystal field splitting and absorbs light of longer wavelength.
- Both Assertion and Reason are true and Reason is the correct explanation of Assertion
- Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
- Assertion is true but Reason is false
- Both Assertion and Reason are false
General
✓✗For octahedral complexes of Ni(II), VBT predicts
- diamagnetism with strong field ligands
- a tetrahedral geometry
- inner orbital hybridisation with strong field ligands
- outer orbital (sp3d2) hybridisation and two unpaired electrons, whatever the ligand
General
✓✗The existence of two different coloured complexes with the composition [Co(NH3)4Cl2]+ is due to
- ionisation isomerism
- geometrical isomerism
- coordination isomerism
- linkage isomerism
General
✓✗The formula of dichloridobis(ethane-1,2-diamine)platinum(IV) nitrate is
- [PtCl2(en)](NO3)2
- [PtCl2(en)2]NO3
- [Pt(en)2](NO3)2Cl2
- [PtCl2(en)2](NO3)2
General
✓✗Match List I (ligand) with List II (denticity).
Choose the correct answer from the options given below.
| List I | List II |
| P. H2O | I. 6 |
| Q. C2O42− | II. 3 |
| R. Diethylenetriamine, NH(CH2CH2NH2)2 | III. 2 |
| S. EDTA4− | IV. 1 |
- P-IV, Q-III, R-II, S-I
- P-IV, Q-II, R-III, S-I
- P-III, Q-IV, R-II, S-I
- P-I, Q-III, R-II, S-IV
General
✓✗[Co(NH3)5(NO2)]Cl2 exists in a yellow-brown form and a red form. The red form contains the ligand bonded through
- nitrogen (nitrito-N)
- chlorine
- both N and O as a chelate
- oxygen (nitrito-O)