Q. No.In the complexes [Fe(H2O)6]3+, [Fe(SCN)6]3-, [Fe(C2O4)3]3- and [FeCl6]3-, more stability is shown by
1. [Fe(H2O6]3+
2.
3 [Fe(C2O4)3]3-
4. [FeCl6]3-
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Ammonia forms the complex ion [Cu(NH3)4]2+ with copper ions in alkaline solutions but not in acidic solution. What is the reason for it?
1. In acidic solutions hydration protects copper ions
2. In acidic solutions protons coordinate with ammonia molecules forming ions and molecules are not available
3. In alkaline solutions insoluble is precipitated which is soluble in excess of any alkali
4. Copper hydroxide is an amphoteric substance
For octahedral complex, the value of the 'spin only' magnetic moment for one of the following configuration is 2.84 BM. The correct one is
1. d4 (in strong ligand field)
2. d4 (in weak ligand field)
3. d3 (in weak as well as in strong field)
4. d5 (in strong ligand field)
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In Fe (CO)5, the Fe-C bond possesses
1. ionic character
2. -character only
3. -character only
4. both and character
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Which of the following pairs represents linkage isomers?
1. [Co(NH3)5NO3]SO4 and [Co(NH3)5SO4]NO3
2. [PtCl2)(NH3)4]Br2 and [PtBr2(NH3)4]Cl2
3. [Cu(NH3)4[PtCl4] and [Pt(NH3)4][CuCl4]
4. [Pd(PPh3)2(NCS)2 and [Pt(PPh3)2(SCN)2]
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A solution containing 2.675 g of CoCl3.6NH3 (molar mass=267.5 g mol-1) is passed through a cation exhanger. The chloride ions obtained in solution were treated with excess of AgNO3 to give 4.78 g of AgCl (molar mass = 143.5 g mol-1). The formula of the complex is
(At. mass of Ag = 108 u)
1. [CoCl(NH3)5]Cl2
2. [Co(NH3)6Cl3
3. [CoCl2(NH3)4]Cl
4. [CoCl3(NH3)3]
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Which of the following facts about the complex [Cr(NH3)6]Cl3 is wrong?
| 1. | The complex is an outer orbital complex. |
| 2. | The complex gives a white precipitate with a silver nitrate solution. |
| 3. | The complex involves d2sp3 hybridization and is octahedral in shape. |
| 4. | The complex is paramagnetic. |
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The correct order of the stoichiometries of AgCl formed when AgNO3 in excess is treated with the complexes: CoCl3.6NH3, CoCl3 .5NH3, CoCl3.4NH3 respectively is:
1. 3AgCl, 1AgCl, 2AgCl
2. 3AgCl, 2AgCl, 1AgCl
3. 2AgCl, 3AgCl, 1AgCl
4. 1AgCl, 3AgCl, 2AgCl
The type of isomerism shown by the complex is:
| 1. | Geometrical isomerism | 2. | Coordination isomerism |
| 3. | Ionization isomerism | 4. | Linkage isomerism |
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