274260
Which of the following ions forms most stable complex compound?
1 $\mathrm{Fe}^{3+}$
2 $\mathrm{Mn}^{2+}$
3 $\mathrm{Ni}^{2+}$
4 $\mathrm{Cu}^{2+}$
Explanation:
(A) : Greater the charge on the central metal ion, greater is the stability of complex.
JCECE - 2011
COORDINATION COMPOUNDS
274190
The number of EDTA (Ethylene Diamine Tetracetic Acid) molecules to make an octahedral complex with a $\mathrm{Ca}^{2+}$ ion is
1 1
2 2
3 6
4 3
Explanation:
(A) : An octahedral complex has 6 bonds around the central atom. One EDTA molecule complexes with one molecule of calcium cation to form octahedral complex.
Assam CEE-2020
COORDINATION COMPOUNDS
274245
The coordination number of a central metal atom in a complex is determined by-
1 the number of ligands around a metal ion bonded by $\sigma$-bonds
2 the number of ligands around a metal ion bonded by $\pi$-bonds
3 the number of ligands around a metal ion bonded by $\sigma$ and $\pi$-bonds both
4 the number of only anionic ligands bonded to the metal ion
Explanation:
(A) : The coordination number of a central metal atom in a complex is determined by the number of ligands around a metal ion bonded by $\sigma$ - bond through metal.
BCECE-2010
COORDINATION COMPOUNDS
274178
Which of the following pairs has both the ions coloured in aqueous solution ? [Atomic numbers of $\mathrm{Sc}=21, \mathrm{Tl}=22, \mathrm{Ni}=28$, $\mathrm{Cu}=29$ and $\mathrm{Mn}=25$ ]
1 $\mathrm{Sc}^{3+}, \mathrm{Mn}^{2+}$
2 $\mathrm{Ni}^{2+}, \mathrm{Tl}^{4+}$
3 $\mathrm{Tl}^{3+}, \mathrm{Cu}^{+}$
4 $\mathrm{Mn}^{2+}, \mathrm{Tl}^{3+}$
Explanation:
(D) : The ions get coloured in aqueous solution only when. The metal ions have the unpaired electron. $\mathrm{Mn}^{2+}$ and $\mathrm{Ti}^{3+}$ both have the 5 and 1 unpaired electron respectively due to which transition occur between lower energy state to higher energy state. Thus, $\mathrm{Mn}^{2+}$ and $\mathrm{Ti}^{3+}$ both the ions coloured in aqueous solution.
274260
Which of the following ions forms most stable complex compound?
1 $\mathrm{Fe}^{3+}$
2 $\mathrm{Mn}^{2+}$
3 $\mathrm{Ni}^{2+}$
4 $\mathrm{Cu}^{2+}$
Explanation:
(A) : Greater the charge on the central metal ion, greater is the stability of complex.
JCECE - 2011
COORDINATION COMPOUNDS
274190
The number of EDTA (Ethylene Diamine Tetracetic Acid) molecules to make an octahedral complex with a $\mathrm{Ca}^{2+}$ ion is
1 1
2 2
3 6
4 3
Explanation:
(A) : An octahedral complex has 6 bonds around the central atom. One EDTA molecule complexes with one molecule of calcium cation to form octahedral complex.
Assam CEE-2020
COORDINATION COMPOUNDS
274245
The coordination number of a central metal atom in a complex is determined by-
1 the number of ligands around a metal ion bonded by $\sigma$-bonds
2 the number of ligands around a metal ion bonded by $\pi$-bonds
3 the number of ligands around a metal ion bonded by $\sigma$ and $\pi$-bonds both
4 the number of only anionic ligands bonded to the metal ion
Explanation:
(A) : The coordination number of a central metal atom in a complex is determined by the number of ligands around a metal ion bonded by $\sigma$ - bond through metal.
BCECE-2010
COORDINATION COMPOUNDS
274178
Which of the following pairs has both the ions coloured in aqueous solution ? [Atomic numbers of $\mathrm{Sc}=21, \mathrm{Tl}=22, \mathrm{Ni}=28$, $\mathrm{Cu}=29$ and $\mathrm{Mn}=25$ ]
1 $\mathrm{Sc}^{3+}, \mathrm{Mn}^{2+}$
2 $\mathrm{Ni}^{2+}, \mathrm{Tl}^{4+}$
3 $\mathrm{Tl}^{3+}, \mathrm{Cu}^{+}$
4 $\mathrm{Mn}^{2+}, \mathrm{Tl}^{3+}$
Explanation:
(D) : The ions get coloured in aqueous solution only when. The metal ions have the unpaired electron. $\mathrm{Mn}^{2+}$ and $\mathrm{Ti}^{3+}$ both have the 5 and 1 unpaired electron respectively due to which transition occur between lower energy state to higher energy state. Thus, $\mathrm{Mn}^{2+}$ and $\mathrm{Ti}^{3+}$ both the ions coloured in aqueous solution.
274260
Which of the following ions forms most stable complex compound?
1 $\mathrm{Fe}^{3+}$
2 $\mathrm{Mn}^{2+}$
3 $\mathrm{Ni}^{2+}$
4 $\mathrm{Cu}^{2+}$
Explanation:
(A) : Greater the charge on the central metal ion, greater is the stability of complex.
JCECE - 2011
COORDINATION COMPOUNDS
274190
The number of EDTA (Ethylene Diamine Tetracetic Acid) molecules to make an octahedral complex with a $\mathrm{Ca}^{2+}$ ion is
1 1
2 2
3 6
4 3
Explanation:
(A) : An octahedral complex has 6 bonds around the central atom. One EDTA molecule complexes with one molecule of calcium cation to form octahedral complex.
Assam CEE-2020
COORDINATION COMPOUNDS
274245
The coordination number of a central metal atom in a complex is determined by-
1 the number of ligands around a metal ion bonded by $\sigma$-bonds
2 the number of ligands around a metal ion bonded by $\pi$-bonds
3 the number of ligands around a metal ion bonded by $\sigma$ and $\pi$-bonds both
4 the number of only anionic ligands bonded to the metal ion
Explanation:
(A) : The coordination number of a central metal atom in a complex is determined by the number of ligands around a metal ion bonded by $\sigma$ - bond through metal.
BCECE-2010
COORDINATION COMPOUNDS
274178
Which of the following pairs has both the ions coloured in aqueous solution ? [Atomic numbers of $\mathrm{Sc}=21, \mathrm{Tl}=22, \mathrm{Ni}=28$, $\mathrm{Cu}=29$ and $\mathrm{Mn}=25$ ]
1 $\mathrm{Sc}^{3+}, \mathrm{Mn}^{2+}$
2 $\mathrm{Ni}^{2+}, \mathrm{Tl}^{4+}$
3 $\mathrm{Tl}^{3+}, \mathrm{Cu}^{+}$
4 $\mathrm{Mn}^{2+}, \mathrm{Tl}^{3+}$
Explanation:
(D) : The ions get coloured in aqueous solution only when. The metal ions have the unpaired electron. $\mathrm{Mn}^{2+}$ and $\mathrm{Ti}^{3+}$ both have the 5 and 1 unpaired electron respectively due to which transition occur between lower energy state to higher energy state. Thus, $\mathrm{Mn}^{2+}$ and $\mathrm{Ti}^{3+}$ both the ions coloured in aqueous solution.
274260
Which of the following ions forms most stable complex compound?
1 $\mathrm{Fe}^{3+}$
2 $\mathrm{Mn}^{2+}$
3 $\mathrm{Ni}^{2+}$
4 $\mathrm{Cu}^{2+}$
Explanation:
(A) : Greater the charge on the central metal ion, greater is the stability of complex.
JCECE - 2011
COORDINATION COMPOUNDS
274190
The number of EDTA (Ethylene Diamine Tetracetic Acid) molecules to make an octahedral complex with a $\mathrm{Ca}^{2+}$ ion is
1 1
2 2
3 6
4 3
Explanation:
(A) : An octahedral complex has 6 bonds around the central atom. One EDTA molecule complexes with one molecule of calcium cation to form octahedral complex.
Assam CEE-2020
COORDINATION COMPOUNDS
274245
The coordination number of a central metal atom in a complex is determined by-
1 the number of ligands around a metal ion bonded by $\sigma$-bonds
2 the number of ligands around a metal ion bonded by $\pi$-bonds
3 the number of ligands around a metal ion bonded by $\sigma$ and $\pi$-bonds both
4 the number of only anionic ligands bonded to the metal ion
Explanation:
(A) : The coordination number of a central metal atom in a complex is determined by the number of ligands around a metal ion bonded by $\sigma$ - bond through metal.
BCECE-2010
COORDINATION COMPOUNDS
274178
Which of the following pairs has both the ions coloured in aqueous solution ? [Atomic numbers of $\mathrm{Sc}=21, \mathrm{Tl}=22, \mathrm{Ni}=28$, $\mathrm{Cu}=29$ and $\mathrm{Mn}=25$ ]
1 $\mathrm{Sc}^{3+}, \mathrm{Mn}^{2+}$
2 $\mathrm{Ni}^{2+}, \mathrm{Tl}^{4+}$
3 $\mathrm{Tl}^{3+}, \mathrm{Cu}^{+}$
4 $\mathrm{Mn}^{2+}, \mathrm{Tl}^{3+}$
Explanation:
(D) : The ions get coloured in aqueous solution only when. The metal ions have the unpaired electron. $\mathrm{Mn}^{2+}$ and $\mathrm{Ti}^{3+}$ both have the 5 and 1 unpaired electron respectively due to which transition occur between lower energy state to higher energy state. Thus, $\mathrm{Mn}^{2+}$ and $\mathrm{Ti}^{3+}$ both the ions coloured in aqueous solution.
274260
Which of the following ions forms most stable complex compound?
1 $\mathrm{Fe}^{3+}$
2 $\mathrm{Mn}^{2+}$
3 $\mathrm{Ni}^{2+}$
4 $\mathrm{Cu}^{2+}$
Explanation:
(A) : Greater the charge on the central metal ion, greater is the stability of complex.
JCECE - 2011
COORDINATION COMPOUNDS
274190
The number of EDTA (Ethylene Diamine Tetracetic Acid) molecules to make an octahedral complex with a $\mathrm{Ca}^{2+}$ ion is
1 1
2 2
3 6
4 3
Explanation:
(A) : An octahedral complex has 6 bonds around the central atom. One EDTA molecule complexes with one molecule of calcium cation to form octahedral complex.
Assam CEE-2020
COORDINATION COMPOUNDS
274245
The coordination number of a central metal atom in a complex is determined by-
1 the number of ligands around a metal ion bonded by $\sigma$-bonds
2 the number of ligands around a metal ion bonded by $\pi$-bonds
3 the number of ligands around a metal ion bonded by $\sigma$ and $\pi$-bonds both
4 the number of only anionic ligands bonded to the metal ion
Explanation:
(A) : The coordination number of a central metal atom in a complex is determined by the number of ligands around a metal ion bonded by $\sigma$ - bond through metal.
BCECE-2010
COORDINATION COMPOUNDS
274178
Which of the following pairs has both the ions coloured in aqueous solution ? [Atomic numbers of $\mathrm{Sc}=21, \mathrm{Tl}=22, \mathrm{Ni}=28$, $\mathrm{Cu}=29$ and $\mathrm{Mn}=25$ ]
1 $\mathrm{Sc}^{3+}, \mathrm{Mn}^{2+}$
2 $\mathrm{Ni}^{2+}, \mathrm{Tl}^{4+}$
3 $\mathrm{Tl}^{3+}, \mathrm{Cu}^{+}$
4 $\mathrm{Mn}^{2+}, \mathrm{Tl}^{3+}$
Explanation:
(D) : The ions get coloured in aqueous solution only when. The metal ions have the unpaired electron. $\mathrm{Mn}^{2+}$ and $\mathrm{Ti}^{3+}$ both have the 5 and 1 unpaired electron respectively due to which transition occur between lower energy state to higher energy state. Thus, $\mathrm{Mn}^{2+}$ and $\mathrm{Ti}^{3+}$ both the ions coloured in aqueous solution.
