- 1(current)
Q. No.The number of EDTA (ethylenediaminetetraacetic acid) molecules that are required to make an octahedral complex with a Ca2+ ion is/are:
1. Six (6)
2. Three (3)
3. One (1)
4. Two (2)
Subtopic: Ligands |
64%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
\(\mathrm{Fe^{3+}}\) ion gives a Prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of:
| 1. | \(\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]_2\left[\mathrm{Fe}(\mathrm{CN})_6\right] \) | 2. | \(\mathrm{Fe}_2\left[\mathrm{Fe}(\mathrm{CN})_6\right]_2 \) |
| 3. | \(\mathrm{Fe}_3\left[\mathrm{Fe}(\mathrm{OH})_2(\mathrm{CN})_4\right]_2 \) | 4. | \(\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3\) |
Subtopic: Ligands |
73%
Level 2: 60%+
Please attempt this question first.
Hints
Which one of the following metal complexes is the most stable?
1. \(\left[\mathrm{Co}(\mathrm{en})_2\left(\mathrm{NH}_3\right)_2\right] \mathrm{Cl}_2\)
2. \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_2\)
3. \(\left[\mathrm{Co}(\mathrm{en})_3\right] \mathrm{Cl}_2\)
4. \(\left[\mathrm{Co}(\mathrm{en})\left(\mathrm{NH}_3\right)_4\right] \mathrm{Cl}_2\)
1. \(\left[\mathrm{Co}(\mathrm{en})_2\left(\mathrm{NH}_3\right)_2\right] \mathrm{Cl}_2\)
2. \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_2\)
3. \(\left[\mathrm{Co}(\mathrm{en})_3\right] \mathrm{Cl}_2\)
4. \(\left[\mathrm{Co}(\mathrm{en})\left(\mathrm{NH}_3\right)_4\right] \mathrm{Cl}_2\)
Subtopic: Ligands |
76%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Consider the following complexes:
(A) \(\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}\)
(B) \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{H}_2 \mathrm{O}\right]^{3+}\)
(C) \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}\)
(D) \(\left[\mathrm{CoF}_6\right]^{3-}\)
The wavelength absorbed by the above complexes are in the order of:
1. A > B > C > D
2. A < B < C < D
3. B < A < C < D
4. C > A > B > D
(A) \(\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}\)
(B) \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{H}_2 \mathrm{O}\right]^{3+}\)
(C) \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}\)
(D) \(\left[\mathrm{CoF}_6\right]^{3-}\)
The wavelength absorbed by the above complexes are in the order of:
1. A > B > C > D
2. A < B < C < D
3. B < A < C < D
4. C > A > B > D
Subtopic: Ligands |
Please attempt this question first.
Hints
How many of the following complexes have unpaired electrons?
\(\left[\mathrm{Ni}(\mathrm{CO})_4\right],\left[\mathrm{NiCl}_4\right]^{2-},\left[\mathrm{PtCl}_4\right]^{2-},\) \(\left[\mathrm{Pt}(\mathrm{CN})_4\right]^{2-},\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]\)
1. Two (2)
2. One (1)
3. Zero (0)
4. Three (3)
\(\left[\mathrm{Ni}(\mathrm{CO})_4\right],\left[\mathrm{NiCl}_4\right]^{2-},\left[\mathrm{PtCl}_4\right]^{2-},\) \(\left[\mathrm{Pt}(\mathrm{CN})_4\right]^{2-},\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]\)
1. Two (2)
2. One (1)
3. Zero (0)
4. Three (3)
Subtopic: Ligands | VBT, CFT & their Limitations |
Please attempt this question first.
Hints
Given below are two statements:
1. Both statements-I and II are correct
2. Both statements-I and II are incorrect
3. Statement-I is correct and statement-II is incorrect
4. Statement-I is incorrect and statement-II is correct
| Statement-I: | \( {\left[\mathrm{CoBr}_4\right]^{2-}}\) absorbs lesser energy than \( \left[\mathrm{CoCl}_4\right]^{2-} \). |
| Statement-II: | \( \left[\mathrm{CoCl}_4\right]^{2-} \) has higher crystal field splitting energy than \( {\left[\mathrm{CoBr}_4\right]^{2-}}\). |
1. Both statements-I and II are correct
2. Both statements-I and II are incorrect
3. Statement-I is correct and statement-II is incorrect
4. Statement-I is incorrect and statement-II is correct
Subtopic: Ligands |
Please attempt this question first.
Hints
- 1(current)
Q. No.
© 2026 GoodEd Technologies Pvt. Ltd.