274270
The colour of the solution/precipitate obtained in the elemental analysis of an organic compound and the molecule/ion responsible for the colour are given below. Choose the incorrectly matched pair.
(E) : Incorrectly matched pair is $\left(\mathrm{NH}_{4}\right)_{2} \mathrm{MoO}_{4}$ of yellow colour. While $\left(\mathrm{NH}_{4}\right)_{3} \mathrm{PO}_{4} .12 \mathrm{MoO}_{3}$ is yellow in colour.
Kerala-CEE-2013
COORDINATION COMPOUNDS
274272
Which one of the following is an inner orbital complex as well as diamagnetic in behaviour?
(C) : In $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ cobalt has oxidation state +3 $\mathrm{NH}_{3}$ is strong field ligand with oxidation number of metal +3 . So, pairing of metal d-electrons are possible. $\mathrm{Co}^{3+}: \mathrm{d}^{6}$ Here, inner $\mathrm{d}$ orbital is used for hybridisation then complex is known as inner orbital complex. No unpaired electron is present in $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ complex so it behave like diamagnetic substance.
AIPMT -2005
COORDINATION COMPOUNDS
274273
Octahedral complexes of copper (II) undergo structural distortion (Jahn-Teller). Which one of the given copper (II) complexes will how the maximum structural distortion ? (en-ethylenediamine; $\mathrm{H}_{2} \mathrm{~N}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{NH}_{2}$ )
2 $\left[\mathrm{Cu}(\right.$ en $\left.)\left(\mathrm{H}_{2} \mathrm{O}_{4}\right)\right] \mathrm{SO}_{4}$
3 cis $-\left[\mathrm{Cu}(\text { en })_{2} \mathrm{Cl}_{2}\right]$
4 trans $-\left[\mathrm{Cu}(\text { en })_{2} \mathrm{Cl}_{2}\right]$
Explanation:
(A) : There is unsymmetric filling of $\mathrm{e}_{\mathrm{g}}$ subset of $\mathrm{Cu}^{+2}$ ion, while there is symmetrical distribution in $\mathrm{t}_{2 \mathrm{~g}}$ set, if the complex has same ligand there will be equal repulsion which leads to symmetrical bond length along $\mathrm{t}_{2 \mathrm{~g}}$, but due to uneven filling of electron in $\mathrm{e}_{\mathrm{g}}$ subset, either octahedral will be elongated or compressed. $\mathrm{t}_{2 \mathrm{~g}} \rightarrow\left(\mathrm{d}_{\mathrm{xz}}, \mathrm{d}_{\mathrm{yz}}, \mathrm{d}_{\mathrm{xy}}\right)$ $\mathrm{e}_{\mathrm{g}} \rightarrow\left(\mathrm{d}_{\mathrm{z}^{2}}\right.$ and $\left.\mathrm{d}_{\mathrm{x}^{2}-\mathrm{y}^{2}}\right)$
JEE Main 29.07.2022
COORDINATION COMPOUNDS
274274
The crystal filed theory is successful in explaining which of the following? I. Ligands as point charges; II. formation and structures of complexes. III. colour, IV. Magnetic properties V. covalent character of metal-ligand bonding
1 I, II, III, only
2 II, III, IV only
3 III, IV, V only
4 II, IV, V only
Explanation:
(B) : The following are some of the advantages of crystal field theory:- - This theory can be used to describe the stability of complexes. The greater the crystal field splitting energy, the greater the stability. - Complexes colour and spectra can be explains complexes magnetic properties. - This theory explains complexes magnetic properties.
274270
The colour of the solution/precipitate obtained in the elemental analysis of an organic compound and the molecule/ion responsible for the colour are given below. Choose the incorrectly matched pair.
(E) : Incorrectly matched pair is $\left(\mathrm{NH}_{4}\right)_{2} \mathrm{MoO}_{4}$ of yellow colour. While $\left(\mathrm{NH}_{4}\right)_{3} \mathrm{PO}_{4} .12 \mathrm{MoO}_{3}$ is yellow in colour.
Kerala-CEE-2013
COORDINATION COMPOUNDS
274272
Which one of the following is an inner orbital complex as well as diamagnetic in behaviour?
(C) : In $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ cobalt has oxidation state +3 $\mathrm{NH}_{3}$ is strong field ligand with oxidation number of metal +3 . So, pairing of metal d-electrons are possible. $\mathrm{Co}^{3+}: \mathrm{d}^{6}$ Here, inner $\mathrm{d}$ orbital is used for hybridisation then complex is known as inner orbital complex. No unpaired electron is present in $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ complex so it behave like diamagnetic substance.
AIPMT -2005
COORDINATION COMPOUNDS
274273
Octahedral complexes of copper (II) undergo structural distortion (Jahn-Teller). Which one of the given copper (II) complexes will how the maximum structural distortion ? (en-ethylenediamine; $\mathrm{H}_{2} \mathrm{~N}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{NH}_{2}$ )
2 $\left[\mathrm{Cu}(\right.$ en $\left.)\left(\mathrm{H}_{2} \mathrm{O}_{4}\right)\right] \mathrm{SO}_{4}$
3 cis $-\left[\mathrm{Cu}(\text { en })_{2} \mathrm{Cl}_{2}\right]$
4 trans $-\left[\mathrm{Cu}(\text { en })_{2} \mathrm{Cl}_{2}\right]$
Explanation:
(A) : There is unsymmetric filling of $\mathrm{e}_{\mathrm{g}}$ subset of $\mathrm{Cu}^{+2}$ ion, while there is symmetrical distribution in $\mathrm{t}_{2 \mathrm{~g}}$ set, if the complex has same ligand there will be equal repulsion which leads to symmetrical bond length along $\mathrm{t}_{2 \mathrm{~g}}$, but due to uneven filling of electron in $\mathrm{e}_{\mathrm{g}}$ subset, either octahedral will be elongated or compressed. $\mathrm{t}_{2 \mathrm{~g}} \rightarrow\left(\mathrm{d}_{\mathrm{xz}}, \mathrm{d}_{\mathrm{yz}}, \mathrm{d}_{\mathrm{xy}}\right)$ $\mathrm{e}_{\mathrm{g}} \rightarrow\left(\mathrm{d}_{\mathrm{z}^{2}}\right.$ and $\left.\mathrm{d}_{\mathrm{x}^{2}-\mathrm{y}^{2}}\right)$
JEE Main 29.07.2022
COORDINATION COMPOUNDS
274274
The crystal filed theory is successful in explaining which of the following? I. Ligands as point charges; II. formation and structures of complexes. III. colour, IV. Magnetic properties V. covalent character of metal-ligand bonding
1 I, II, III, only
2 II, III, IV only
3 III, IV, V only
4 II, IV, V only
Explanation:
(B) : The following are some of the advantages of crystal field theory:- - This theory can be used to describe the stability of complexes. The greater the crystal field splitting energy, the greater the stability. - Complexes colour and spectra can be explains complexes magnetic properties. - This theory explains complexes magnetic properties.
NEET Test Series from KOTA - 10 Papers In MS WORD
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COORDINATION COMPOUNDS
274270
The colour of the solution/precipitate obtained in the elemental analysis of an organic compound and the molecule/ion responsible for the colour are given below. Choose the incorrectly matched pair.
(E) : Incorrectly matched pair is $\left(\mathrm{NH}_{4}\right)_{2} \mathrm{MoO}_{4}$ of yellow colour. While $\left(\mathrm{NH}_{4}\right)_{3} \mathrm{PO}_{4} .12 \mathrm{MoO}_{3}$ is yellow in colour.
Kerala-CEE-2013
COORDINATION COMPOUNDS
274272
Which one of the following is an inner orbital complex as well as diamagnetic in behaviour?
(C) : In $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ cobalt has oxidation state +3 $\mathrm{NH}_{3}$ is strong field ligand with oxidation number of metal +3 . So, pairing of metal d-electrons are possible. $\mathrm{Co}^{3+}: \mathrm{d}^{6}$ Here, inner $\mathrm{d}$ orbital is used for hybridisation then complex is known as inner orbital complex. No unpaired electron is present in $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ complex so it behave like diamagnetic substance.
AIPMT -2005
COORDINATION COMPOUNDS
274273
Octahedral complexes of copper (II) undergo structural distortion (Jahn-Teller). Which one of the given copper (II) complexes will how the maximum structural distortion ? (en-ethylenediamine; $\mathrm{H}_{2} \mathrm{~N}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{NH}_{2}$ )
2 $\left[\mathrm{Cu}(\right.$ en $\left.)\left(\mathrm{H}_{2} \mathrm{O}_{4}\right)\right] \mathrm{SO}_{4}$
3 cis $-\left[\mathrm{Cu}(\text { en })_{2} \mathrm{Cl}_{2}\right]$
4 trans $-\left[\mathrm{Cu}(\text { en })_{2} \mathrm{Cl}_{2}\right]$
Explanation:
(A) : There is unsymmetric filling of $\mathrm{e}_{\mathrm{g}}$ subset of $\mathrm{Cu}^{+2}$ ion, while there is symmetrical distribution in $\mathrm{t}_{2 \mathrm{~g}}$ set, if the complex has same ligand there will be equal repulsion which leads to symmetrical bond length along $\mathrm{t}_{2 \mathrm{~g}}$, but due to uneven filling of electron in $\mathrm{e}_{\mathrm{g}}$ subset, either octahedral will be elongated or compressed. $\mathrm{t}_{2 \mathrm{~g}} \rightarrow\left(\mathrm{d}_{\mathrm{xz}}, \mathrm{d}_{\mathrm{yz}}, \mathrm{d}_{\mathrm{xy}}\right)$ $\mathrm{e}_{\mathrm{g}} \rightarrow\left(\mathrm{d}_{\mathrm{z}^{2}}\right.$ and $\left.\mathrm{d}_{\mathrm{x}^{2}-\mathrm{y}^{2}}\right)$
JEE Main 29.07.2022
COORDINATION COMPOUNDS
274274
The crystal filed theory is successful in explaining which of the following? I. Ligands as point charges; II. formation and structures of complexes. III. colour, IV. Magnetic properties V. covalent character of metal-ligand bonding
1 I, II, III, only
2 II, III, IV only
3 III, IV, V only
4 II, IV, V only
Explanation:
(B) : The following are some of the advantages of crystal field theory:- - This theory can be used to describe the stability of complexes. The greater the crystal field splitting energy, the greater the stability. - Complexes colour and spectra can be explains complexes magnetic properties. - This theory explains complexes magnetic properties.
274270
The colour of the solution/precipitate obtained in the elemental analysis of an organic compound and the molecule/ion responsible for the colour are given below. Choose the incorrectly matched pair.
(E) : Incorrectly matched pair is $\left(\mathrm{NH}_{4}\right)_{2} \mathrm{MoO}_{4}$ of yellow colour. While $\left(\mathrm{NH}_{4}\right)_{3} \mathrm{PO}_{4} .12 \mathrm{MoO}_{3}$ is yellow in colour.
Kerala-CEE-2013
COORDINATION COMPOUNDS
274272
Which one of the following is an inner orbital complex as well as diamagnetic in behaviour?
(C) : In $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ cobalt has oxidation state +3 $\mathrm{NH}_{3}$ is strong field ligand with oxidation number of metal +3 . So, pairing of metal d-electrons are possible. $\mathrm{Co}^{3+}: \mathrm{d}^{6}$ Here, inner $\mathrm{d}$ orbital is used for hybridisation then complex is known as inner orbital complex. No unpaired electron is present in $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ complex so it behave like diamagnetic substance.
AIPMT -2005
COORDINATION COMPOUNDS
274273
Octahedral complexes of copper (II) undergo structural distortion (Jahn-Teller). Which one of the given copper (II) complexes will how the maximum structural distortion ? (en-ethylenediamine; $\mathrm{H}_{2} \mathrm{~N}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{NH}_{2}$ )
2 $\left[\mathrm{Cu}(\right.$ en $\left.)\left(\mathrm{H}_{2} \mathrm{O}_{4}\right)\right] \mathrm{SO}_{4}$
3 cis $-\left[\mathrm{Cu}(\text { en })_{2} \mathrm{Cl}_{2}\right]$
4 trans $-\left[\mathrm{Cu}(\text { en })_{2} \mathrm{Cl}_{2}\right]$
Explanation:
(A) : There is unsymmetric filling of $\mathrm{e}_{\mathrm{g}}$ subset of $\mathrm{Cu}^{+2}$ ion, while there is symmetrical distribution in $\mathrm{t}_{2 \mathrm{~g}}$ set, if the complex has same ligand there will be equal repulsion which leads to symmetrical bond length along $\mathrm{t}_{2 \mathrm{~g}}$, but due to uneven filling of electron in $\mathrm{e}_{\mathrm{g}}$ subset, either octahedral will be elongated or compressed. $\mathrm{t}_{2 \mathrm{~g}} \rightarrow\left(\mathrm{d}_{\mathrm{xz}}, \mathrm{d}_{\mathrm{yz}}, \mathrm{d}_{\mathrm{xy}}\right)$ $\mathrm{e}_{\mathrm{g}} \rightarrow\left(\mathrm{d}_{\mathrm{z}^{2}}\right.$ and $\left.\mathrm{d}_{\mathrm{x}^{2}-\mathrm{y}^{2}}\right)$
JEE Main 29.07.2022
COORDINATION COMPOUNDS
274274
The crystal filed theory is successful in explaining which of the following? I. Ligands as point charges; II. formation and structures of complexes. III. colour, IV. Magnetic properties V. covalent character of metal-ligand bonding
1 I, II, III, only
2 II, III, IV only
3 III, IV, V only
4 II, IV, V only
Explanation:
(B) : The following are some of the advantages of crystal field theory:- - This theory can be used to describe the stability of complexes. The greater the crystal field splitting energy, the greater the stability. - Complexes colour and spectra can be explains complexes magnetic properties. - This theory explains complexes magnetic properties.
