Q. No.An example of a sigma bonded organometallic compound is:
1. Ruthenocene
2. Grignard's reagent
3. Ferrocene
4. Cobaltocene
The correct order of the stoichiometrics of AgCl formed when AgNO3 in excess is treated with the complexes:- CoCl3.6NH3, CoCl3.5NH3, CoCl3.4NH3, respectively, is :
1. 1 AgCl, 3 AgCl, 2 AgCl
2. 3 AgCl, 1 AgCl, 2 AgCl
3. 3 AgCl, 2 AgCl, 1 AgCl
4. 2 AgCl, 3AgCl, 1 AgCl
Correct increasing order for the wavelengths of absorption in the visible region for the complexes of \(\text{Co}^{3+}\) is:
| 1. | \(\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}<\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}\) |
| 2. | \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}<\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}\) |
| 3. | \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}<\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}\) |
| 4. | \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}<\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}<\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}\) |
Which of the following statements regarding the complex ion [Mn(CN)6]3- is correct?.
1. It is sp3d2 hybridised and octahedral.
2. It is d2sp3 hybridised and octahedral.
3. It is sp3d2 hybridised and tetrahedral.
4. It is dsp2 hybridised and square planar.
The correct increasing order of trans-effect of the following species is
1. NH3 > CN- > Br- > C6H5-
2. CN- > C6H5- > Br- > NH3
3. Br- > CN- >NH3 > C6H5-
4. CN- > Br- >C6H5- >NH3
Which of the following has longest C-O bond length? (Free C-O bond length in CO is
1.128 Å.)
1. [Co(СО)4]-
2. [Fe(CO)4]2-
3. [Mn(CO)6]+
4. Ni(CO)4
Which of the following statements is false?
1. Ca2+ ions are important in blood clotting
2. Ca2+ ions are not important in maintaining the regular beating of the heart
3. Mg2+ ions are important in the green parts of plants
4. Mg2+ ions form a complex with ATP
Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the
following will not give test for chloride ions with silver nitrate at 25°C?
1. CoCl3.3NH3
2. CoCl3 .4NH3
3. CoCI3 .5NH3
4. CoCl3.6NH3
The correct statement among the following about [Co(CN)6]3- is :
| 1. | It has no unpaired electrons and will be in a low-spin configuration |
| 2. | It has four unpaired electrons and will be in a low-spin configuration |
| 3. | It has four unpaired electrons and will be in a high-spin configuration |
| 4. | It has no unpaired electrons and will be in a high-spin configuration |
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