Q. No.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 compound among the following that does not give a test for chloride ions with silver nitrate at 25 °C is:
The number of moles of AgCl precipitated would be:
| 1. | 0.002 | 2. | 0.003 |
| 3. | 0.01 | 4. | 0.001 |
The d-electron configurations of Cr2+, Mn2+, Fe2+ and Co2+ are d4, d5, d6, and d7 respectively.
Minimum paramagnetic behavior is shown by:
(At. No C = 24, Mn = 25, Fe = 26, Co = 27)
1. [Fe(H2O)6]2+
2. [Co(H2O)6]2+
3. [Cr(H2O)6]2+
4. [Mn(H2O)6]2+
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+
Which of the following complexes has the highest paramagnetic behaviour?
(where gly = glycine, en = ethylenediamine, ox = oxalate ion and bpy = bipyridyl moieties )
(At no : Ti= 22, V = 23, Fe = 26, Co = 27)
1. [V(gly)2(OH)2(NH3)2]+
2. [Fe(en)(bpy)(NH3)2]2+
3. [Co(ox)2(OH)2]-
4. [Ti(NH3)6]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. | \(\mathrm{Ni}^{2+}, \mathrm{Cu}^{+}\) |
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+
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 |
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