Q. No.The geometry and magnetic behaviour of the complex [Ni(CO)4] respectively are:
1. Square planar and diamagnetic.
2. Tetrahedral and diamagnetic.
3. Square planar and paramagnetic.
4. Tetrahedral and paramagnetic.
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Which of the following has the longest C —O bond length? (Free C—O bond length in CO is 1.128 
2. [Fe(CO)4]2-
3. Mn(CO)6]+
4. Ni(CO)4
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Number of possible isomers for the complex [Co(en)2Cl2]Cl will be:
(en=ethylenediamine)
| 1. | 2 | 2. | 1 |
| 3. | 3 | 4. | 4 |
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The IUPAC name for complex ion, [Fe(CN)6]3- is:
| 1. | Hexacyanoiron(III) ion | 2. | Hexacyanitoferrate(III) ion |
| 3. | Tricynoferrate(III) ion | 4. | Hexacyanidoferrate(III) ion |
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Among the following complexes the one which shows zero crystal field stabilization energy (CFSE) is
1.
2.
3.
4.
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| 1. | Ionisation isomerism |
| 2. | Co-ordination isomerism |
| 3. | Geometrical isomerism |
| 4. | Linkage isomerism |
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