Q. No.The sum of the coordination number and oxidation number of the metal M in the complex [M(en)2(C2O4)]Cl is:
1.
9
2.
6
3.
7
4.
8
An ion, among the following, that has a magnetic moment of 2.84 BM is:
(At. no. Ni = 28, Ti = 22, Cr = 24, Co = 27)
1. Ni2+
2. Ti3+
3. Cr2+
4. Co2+
Cobalt(III) chloride forms several octahedral complexes with ammonia.
A compound among the following that does not give a test for chloride ions with silver nitrate at 25 °C is:
| 1. | CoCl3. 3NH3 | 2. | CoCl3. 4NH3 |
| 3. | CoCl3. 5NH3 | 4. | CoCl3. 6NH3 |
A complex ion among the following can absorb visible light is:
(At. no. Zn = 30, Sc = 21, Ti = 22, Cr = 24)
1. [Sc(H2O)3(NH3)3]3+
2. [Ti(en)2 (NH3)2]4+
3. [Cr(NH3)6]3+
4. [Zn(NH3)6]2+
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. | \(\mathrm{Ni}^{2+}, \mathrm{Cu}^{+}\) |
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 the above |
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
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