274382
Which of the following pairs of complexes whose Aqueous solutions gives pale yellow and white Precipates respectively with $0.1 \mathrm{M}$ $\mathrm{AgNO}_{3}$ ?
1 $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl}_{2}$ and $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right] \mathrm{Br}_{2}$
2 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{NO}_{3}\right] \mathrm{Br}$ and $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Br}\right] \mathrm{NO}_{3}$
3 $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right] \mathrm{Br}_{2}$ and $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl}_{2}$
4 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{NO}_{3}\right] \mathrm{Cl}$ and $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Cl}\right] \mathrm{NO}_{3}$
Explanation:
(C) : The complex having $\mathrm{Br}$ and $\mathrm{Cl}$ out of coordination sphere only gives $\mathrm{AgBr}$ (Pale yellow) and $\mathrm{AgCl}$ (White ppt.) respectively upon reaction with $\mathrm{AgNO}_{3}$.
GUJCET-2017
COORDINATION COMPOUNDS
274385
The purple colour of $\mathrm{KMnO}_{4}$ can be attributed to
1 d-d transitions
2 charge transfer transition
3 $n-\pi *$ transitions
4 none of these
Explanation:
(B) : In $\mathrm{KMnO}_{4}, \mathrm{Mn}$ is in +7 oxidation state and has all the $3 \mathrm{~d}$-orbitals vacant. $\mathrm{Mn}^{7+}$ ion is surrounded. Tetrahedrally by four oxide ions. All oxide ions have filled 2p-orbitals. There is a transfer of an electron from filled 2p-orbitals of oxide ion to vacant d-orbital's of $\mathrm{Mn}^{+7}$ ion. So there is a charge transfer transition which results in intense purple colour of $\mathrm{KMnO}_{4}$.
AMU-2016
COORDINATION COMPOUNDS
274386
Coordination compounds have great importance in biological systems. In this context which of the following statements is incorrect?
1 Cyanocobalamin is $\mathrm{B}_{12}$ and contains cobalt.
2 Haemoglobin is the red pigment of blood and contains iron.
3 Chlorophylls are green pigments in plants and contain calcium.
4 Carboxypeptidase-A is an enzyme and contains zinc.
Explanation:
(C) : Chlorophylls are green pigments in plants and contain Magnesium and does not contain Calcium.
AIIMS-2015
COORDINATION COMPOUNDS
274387
The color of $\mathrm{CoCl}_{3} \cdot \mathrm{SNH}_{3} \cdot \mathrm{H}_{2} \mathrm{O}$ is
1 red
2 orange
3 orange-yellow
4 pink
Explanation:
(D) : $\mathrm{CoCl}_{3} 5 \mathrm{NH}_{3} \mathrm{H}_{2} \mathrm{O}$ is pink in colour. It has $\mathrm{Co}^{3+}$ ion with [Ar] $3 \mathrm{~d}^{6}$ electronic configuration. If has 4 unpaired electrons.
274382
Which of the following pairs of complexes whose Aqueous solutions gives pale yellow and white Precipates respectively with $0.1 \mathrm{M}$ $\mathrm{AgNO}_{3}$ ?
1 $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl}_{2}$ and $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right] \mathrm{Br}_{2}$
2 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{NO}_{3}\right] \mathrm{Br}$ and $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Br}\right] \mathrm{NO}_{3}$
3 $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right] \mathrm{Br}_{2}$ and $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl}_{2}$
4 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{NO}_{3}\right] \mathrm{Cl}$ and $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Cl}\right] \mathrm{NO}_{3}$
Explanation:
(C) : The complex having $\mathrm{Br}$ and $\mathrm{Cl}$ out of coordination sphere only gives $\mathrm{AgBr}$ (Pale yellow) and $\mathrm{AgCl}$ (White ppt.) respectively upon reaction with $\mathrm{AgNO}_{3}$.
GUJCET-2017
COORDINATION COMPOUNDS
274385
The purple colour of $\mathrm{KMnO}_{4}$ can be attributed to
1 d-d transitions
2 charge transfer transition
3 $n-\pi *$ transitions
4 none of these
Explanation:
(B) : In $\mathrm{KMnO}_{4}, \mathrm{Mn}$ is in +7 oxidation state and has all the $3 \mathrm{~d}$-orbitals vacant. $\mathrm{Mn}^{7+}$ ion is surrounded. Tetrahedrally by four oxide ions. All oxide ions have filled 2p-orbitals. There is a transfer of an electron from filled 2p-orbitals of oxide ion to vacant d-orbital's of $\mathrm{Mn}^{+7}$ ion. So there is a charge transfer transition which results in intense purple colour of $\mathrm{KMnO}_{4}$.
AMU-2016
COORDINATION COMPOUNDS
274386
Coordination compounds have great importance in biological systems. In this context which of the following statements is incorrect?
1 Cyanocobalamin is $\mathrm{B}_{12}$ and contains cobalt.
2 Haemoglobin is the red pigment of blood and contains iron.
3 Chlorophylls are green pigments in plants and contain calcium.
4 Carboxypeptidase-A is an enzyme and contains zinc.
Explanation:
(C) : Chlorophylls are green pigments in plants and contain Magnesium and does not contain Calcium.
AIIMS-2015
COORDINATION COMPOUNDS
274387
The color of $\mathrm{CoCl}_{3} \cdot \mathrm{SNH}_{3} \cdot \mathrm{H}_{2} \mathrm{O}$ is
1 red
2 orange
3 orange-yellow
4 pink
Explanation:
(D) : $\mathrm{CoCl}_{3} 5 \mathrm{NH}_{3} \mathrm{H}_{2} \mathrm{O}$ is pink in colour. It has $\mathrm{Co}^{3+}$ ion with [Ar] $3 \mathrm{~d}^{6}$ electronic configuration. If has 4 unpaired electrons.
274382
Which of the following pairs of complexes whose Aqueous solutions gives pale yellow and white Precipates respectively with $0.1 \mathrm{M}$ $\mathrm{AgNO}_{3}$ ?
1 $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl}_{2}$ and $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right] \mathrm{Br}_{2}$
2 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{NO}_{3}\right] \mathrm{Br}$ and $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Br}\right] \mathrm{NO}_{3}$
3 $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right] \mathrm{Br}_{2}$ and $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl}_{2}$
4 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{NO}_{3}\right] \mathrm{Cl}$ and $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Cl}\right] \mathrm{NO}_{3}$
Explanation:
(C) : The complex having $\mathrm{Br}$ and $\mathrm{Cl}$ out of coordination sphere only gives $\mathrm{AgBr}$ (Pale yellow) and $\mathrm{AgCl}$ (White ppt.) respectively upon reaction with $\mathrm{AgNO}_{3}$.
GUJCET-2017
COORDINATION COMPOUNDS
274385
The purple colour of $\mathrm{KMnO}_{4}$ can be attributed to
1 d-d transitions
2 charge transfer transition
3 $n-\pi *$ transitions
4 none of these
Explanation:
(B) : In $\mathrm{KMnO}_{4}, \mathrm{Mn}$ is in +7 oxidation state and has all the $3 \mathrm{~d}$-orbitals vacant. $\mathrm{Mn}^{7+}$ ion is surrounded. Tetrahedrally by four oxide ions. All oxide ions have filled 2p-orbitals. There is a transfer of an electron from filled 2p-orbitals of oxide ion to vacant d-orbital's of $\mathrm{Mn}^{+7}$ ion. So there is a charge transfer transition which results in intense purple colour of $\mathrm{KMnO}_{4}$.
AMU-2016
COORDINATION COMPOUNDS
274386
Coordination compounds have great importance in biological systems. In this context which of the following statements is incorrect?
1 Cyanocobalamin is $\mathrm{B}_{12}$ and contains cobalt.
2 Haemoglobin is the red pigment of blood and contains iron.
3 Chlorophylls are green pigments in plants and contain calcium.
4 Carboxypeptidase-A is an enzyme and contains zinc.
Explanation:
(C) : Chlorophylls are green pigments in plants and contain Magnesium and does not contain Calcium.
AIIMS-2015
COORDINATION COMPOUNDS
274387
The color of $\mathrm{CoCl}_{3} \cdot \mathrm{SNH}_{3} \cdot \mathrm{H}_{2} \mathrm{O}$ is
1 red
2 orange
3 orange-yellow
4 pink
Explanation:
(D) : $\mathrm{CoCl}_{3} 5 \mathrm{NH}_{3} \mathrm{H}_{2} \mathrm{O}$ is pink in colour. It has $\mathrm{Co}^{3+}$ ion with [Ar] $3 \mathrm{~d}^{6}$ electronic configuration. If has 4 unpaired electrons.
274382
Which of the following pairs of complexes whose Aqueous solutions gives pale yellow and white Precipates respectively with $0.1 \mathrm{M}$ $\mathrm{AgNO}_{3}$ ?
1 $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl}_{2}$ and $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right] \mathrm{Br}_{2}$
2 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{NO}_{3}\right] \mathrm{Br}$ and $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Br}\right] \mathrm{NO}_{3}$
3 $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right] \mathrm{Br}_{2}$ and $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl}_{2}$
4 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{NO}_{3}\right] \mathrm{Cl}$ and $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Cl}\right] \mathrm{NO}_{3}$
Explanation:
(C) : The complex having $\mathrm{Br}$ and $\mathrm{Cl}$ out of coordination sphere only gives $\mathrm{AgBr}$ (Pale yellow) and $\mathrm{AgCl}$ (White ppt.) respectively upon reaction with $\mathrm{AgNO}_{3}$.
GUJCET-2017
COORDINATION COMPOUNDS
274385
The purple colour of $\mathrm{KMnO}_{4}$ can be attributed to
1 d-d transitions
2 charge transfer transition
3 $n-\pi *$ transitions
4 none of these
Explanation:
(B) : In $\mathrm{KMnO}_{4}, \mathrm{Mn}$ is in +7 oxidation state and has all the $3 \mathrm{~d}$-orbitals vacant. $\mathrm{Mn}^{7+}$ ion is surrounded. Tetrahedrally by four oxide ions. All oxide ions have filled 2p-orbitals. There is a transfer of an electron from filled 2p-orbitals of oxide ion to vacant d-orbital's of $\mathrm{Mn}^{+7}$ ion. So there is a charge transfer transition which results in intense purple colour of $\mathrm{KMnO}_{4}$.
AMU-2016
COORDINATION COMPOUNDS
274386
Coordination compounds have great importance in biological systems. In this context which of the following statements is incorrect?
1 Cyanocobalamin is $\mathrm{B}_{12}$ and contains cobalt.
2 Haemoglobin is the red pigment of blood and contains iron.
3 Chlorophylls are green pigments in plants and contain calcium.
4 Carboxypeptidase-A is an enzyme and contains zinc.
Explanation:
(C) : Chlorophylls are green pigments in plants and contain Magnesium and does not contain Calcium.
AIIMS-2015
COORDINATION COMPOUNDS
274387
The color of $\mathrm{CoCl}_{3} \cdot \mathrm{SNH}_{3} \cdot \mathrm{H}_{2} \mathrm{O}$ is
1 red
2 orange
3 orange-yellow
4 pink
Explanation:
(D) : $\mathrm{CoCl}_{3} 5 \mathrm{NH}_{3} \mathrm{H}_{2} \mathrm{O}$ is pink in colour. It has $\mathrm{Co}^{3+}$ ion with [Ar] $3 \mathrm{~d}^{6}$ electronic configuration. If has 4 unpaired electrons.
