Q. No.The low spin complex among the following is:
1.
\(\mathrm{Fe}(\mathrm{CN})_6^{3-} \)
2.
\(\mathrm{Co}\left(\mathrm{NO}_2\right)_6^{3-} \)
3.
\(\mathrm{Mn}(\mathrm{CN})_6^{3-} \)
4.
All of these
The complex that contains only one unpaired electron is:
1. [CoF6]3-
2. [Co(C2O4)3]3-
3. [Fe(CN)6]3-
4. [MnCl6]3-
The expected number of unpaired electrons for the complex ion [Cr(NH3)6]3+ are:
1. 2
2. 3
3. 4
4. 5
The electronic configuration that represents the maximum magnetic moment is:
1.
2.
3.
4. (high spin)
The IUPAC name of [\(\mathrm {C r \left(en\right)_{3}}\)]\(\mathrm{C l}_{3}\) is:
| 1. | Triethylenediaminechromium (III) chloride |
| 2. | Tris(ethylenediammine)chromium (II) chloride |
| 3. | Tris(ethylenediamine)chromium (III) chloride |
| 4. | Tris(ethylenediammine)chromium (I) chloride |
The crystal field stabilization energy (CFSE) for [CoCl6]4– is 18000 cm–1.
The CFSE for [CoCl4]2– will be:
| 1. | 2. | ||
| 3. | 4. |
|
Spin-only magnetic moments of [Fe(NH3)6]3+ and [FeF6]3- in BM are, respectively :
| 1. | 1.73 and 1.73 | 2. | 5.92 and 1.73 |
| 3. | 1.73 and 5.92 | 4. | 5.92 and 5.92 |
2.335 g of compound X (empirical formal CoH12N4Cl3) upon treatment with excess AgNO3 solution produces 1.435 g of a white precipitate. Determine the primary and secondary valences of cobalt in compound X, respectively.
[Given Atomic mass: Co = 59, Cl = 35.5, Ag = 108]
| 1. | 3, 6 | 2. | 3, 4 |
| 3. | 2, 4 | 4. | 4, 3 |
A pair that contains both the ions coloured in an aqueous solution is:
(At. no. : Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)
| 1. | \(N i^{2+}, T i^{3+} \) | 2. | \(S c^{3+}, T i^{3+} \) |
| 3. | \(\mathrm{Sc}^{3+}, \mathrm{Co}^{2+} \) | 4. | \(\mathrm{Ni}^{2+}, \mathrm{Cu}^{+}\) |
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