274314
The formula of 'spinal' is $\mathrm{AB}_{2} \mathrm{O}_{4}$, where $\mathrm{A}$ is ........, and $B$ is
1 **A** -II A element **B** -III A metal
2 **A** -III A metal **B** -II A element
3 **A** -Transition metal in +3 state **B** -Transition metal in +2 state
4 **A** -II A element **B** -Transition metal in +2 state
Explanation:
(A) : The general formula of the spinal is $\mathrm{AB}_{2} \mathrm{O}_{4}$ where, A represents divalent metal ion such as $\mathrm{Mg}, \mathrm{Fe}$, $\mathrm{Ni}, \mathrm{Mn}$ and $\mathrm{B}$ represents trivalent metal ion such as $\mathrm{Al}$, $\mathrm{Fe}, \mathrm{Cr}$, Ti, etc. Generally $\mathrm{MgAl}_{2} \mathrm{O}_{4}$ as spinal is mostly occur in nature.
AP - EAMCET(MEDICAL) - 2009
COORDINATION COMPOUNDS
274324
Elements $\mathrm{Se}, \mathrm{Cl}$ and $\mathrm{S}$ have been arranged in the order of increasing ionisation energies. Identify the correct order.
1 $\mathrm{S}<\mathrm{Se}<\mathrm{Cl}$
2 $\mathrm{Se}<\mathrm{S}<\mathrm{Cl}$
3 $\mathrm{Cl}<\mathrm{S}<\mathrm{Se}$
4 $\mathrm{Se}=\mathrm{S}<\mathrm{Cl}$
Explanation:
(B) : Ionisation energy generally increases from left to right across a row of the Periodic Table and decreases from top to bottom down a group. Hence, IE of $\mathrm{Cl}>\mathrm{S}$ and IE of $\mathrm{Se}<\mathrm{S}$. So, the order is $\mathrm{Se}<\mathrm{S}<\mathrm{Cl}$.
JCECE - 2013
COORDINATION COMPOUNDS
274325
In which of the following coordination entities the magnitude of $\Delta_{0}$ (CFSE in octahedral field) will be maximum?
(A) : The complex which has the high ligand field according to the spectrochemical series, having the greater CFSE in octahedral field. Here, CN ligand has more field due to Which $\left[\mathrm{CO}(\mathrm{CN})_{6}\right]^{3-}$ has more CFSE.
AIPMT -2008
COORDINATION COMPOUNDS
274264
A ligand can also be regarded as
1 Lewis acid
2 Bronsted base
3 Lewis base
4 Bronsted acid
Explanation:
(C) : A ligand is a species that is capable of donating an electron pair (s) to the central metal ion. The substances which are capable of donating an electron pair are called Lewis base, so a ligand is also a Lewis base.
274314
The formula of 'spinal' is $\mathrm{AB}_{2} \mathrm{O}_{4}$, where $\mathrm{A}$ is ........, and $B$ is
1 **A** -II A element **B** -III A metal
2 **A** -III A metal **B** -II A element
3 **A** -Transition metal in +3 state **B** -Transition metal in +2 state
4 **A** -II A element **B** -Transition metal in +2 state
Explanation:
(A) : The general formula of the spinal is $\mathrm{AB}_{2} \mathrm{O}_{4}$ where, A represents divalent metal ion such as $\mathrm{Mg}, \mathrm{Fe}$, $\mathrm{Ni}, \mathrm{Mn}$ and $\mathrm{B}$ represents trivalent metal ion such as $\mathrm{Al}$, $\mathrm{Fe}, \mathrm{Cr}$, Ti, etc. Generally $\mathrm{MgAl}_{2} \mathrm{O}_{4}$ as spinal is mostly occur in nature.
AP - EAMCET(MEDICAL) - 2009
COORDINATION COMPOUNDS
274324
Elements $\mathrm{Se}, \mathrm{Cl}$ and $\mathrm{S}$ have been arranged in the order of increasing ionisation energies. Identify the correct order.
1 $\mathrm{S}<\mathrm{Se}<\mathrm{Cl}$
2 $\mathrm{Se}<\mathrm{S}<\mathrm{Cl}$
3 $\mathrm{Cl}<\mathrm{S}<\mathrm{Se}$
4 $\mathrm{Se}=\mathrm{S}<\mathrm{Cl}$
Explanation:
(B) : Ionisation energy generally increases from left to right across a row of the Periodic Table and decreases from top to bottom down a group. Hence, IE of $\mathrm{Cl}>\mathrm{S}$ and IE of $\mathrm{Se}<\mathrm{S}$. So, the order is $\mathrm{Se}<\mathrm{S}<\mathrm{Cl}$.
JCECE - 2013
COORDINATION COMPOUNDS
274325
In which of the following coordination entities the magnitude of $\Delta_{0}$ (CFSE in octahedral field) will be maximum?
(A) : The complex which has the high ligand field according to the spectrochemical series, having the greater CFSE in octahedral field. Here, CN ligand has more field due to Which $\left[\mathrm{CO}(\mathrm{CN})_{6}\right]^{3-}$ has more CFSE.
AIPMT -2008
COORDINATION COMPOUNDS
274264
A ligand can also be regarded as
1 Lewis acid
2 Bronsted base
3 Lewis base
4 Bronsted acid
Explanation:
(C) : A ligand is a species that is capable of donating an electron pair (s) to the central metal ion. The substances which are capable of donating an electron pair are called Lewis base, so a ligand is also a Lewis base.
274314
The formula of 'spinal' is $\mathrm{AB}_{2} \mathrm{O}_{4}$, where $\mathrm{A}$ is ........, and $B$ is
1 **A** -II A element **B** -III A metal
2 **A** -III A metal **B** -II A element
3 **A** -Transition metal in +3 state **B** -Transition metal in +2 state
4 **A** -II A element **B** -Transition metal in +2 state
Explanation:
(A) : The general formula of the spinal is $\mathrm{AB}_{2} \mathrm{O}_{4}$ where, A represents divalent metal ion such as $\mathrm{Mg}, \mathrm{Fe}$, $\mathrm{Ni}, \mathrm{Mn}$ and $\mathrm{B}$ represents trivalent metal ion such as $\mathrm{Al}$, $\mathrm{Fe}, \mathrm{Cr}$, Ti, etc. Generally $\mathrm{MgAl}_{2} \mathrm{O}_{4}$ as spinal is mostly occur in nature.
AP - EAMCET(MEDICAL) - 2009
COORDINATION COMPOUNDS
274324
Elements $\mathrm{Se}, \mathrm{Cl}$ and $\mathrm{S}$ have been arranged in the order of increasing ionisation energies. Identify the correct order.
1 $\mathrm{S}<\mathrm{Se}<\mathrm{Cl}$
2 $\mathrm{Se}<\mathrm{S}<\mathrm{Cl}$
3 $\mathrm{Cl}<\mathrm{S}<\mathrm{Se}$
4 $\mathrm{Se}=\mathrm{S}<\mathrm{Cl}$
Explanation:
(B) : Ionisation energy generally increases from left to right across a row of the Periodic Table and decreases from top to bottom down a group. Hence, IE of $\mathrm{Cl}>\mathrm{S}$ and IE of $\mathrm{Se}<\mathrm{S}$. So, the order is $\mathrm{Se}<\mathrm{S}<\mathrm{Cl}$.
JCECE - 2013
COORDINATION COMPOUNDS
274325
In which of the following coordination entities the magnitude of $\Delta_{0}$ (CFSE in octahedral field) will be maximum?
(A) : The complex which has the high ligand field according to the spectrochemical series, having the greater CFSE in octahedral field. Here, CN ligand has more field due to Which $\left[\mathrm{CO}(\mathrm{CN})_{6}\right]^{3-}$ has more CFSE.
AIPMT -2008
COORDINATION COMPOUNDS
274264
A ligand can also be regarded as
1 Lewis acid
2 Bronsted base
3 Lewis base
4 Bronsted acid
Explanation:
(C) : A ligand is a species that is capable of donating an electron pair (s) to the central metal ion. The substances which are capable of donating an electron pair are called Lewis base, so a ligand is also a Lewis base.
274314
The formula of 'spinal' is $\mathrm{AB}_{2} \mathrm{O}_{4}$, where $\mathrm{A}$ is ........, and $B$ is
1 **A** -II A element **B** -III A metal
2 **A** -III A metal **B** -II A element
3 **A** -Transition metal in +3 state **B** -Transition metal in +2 state
4 **A** -II A element **B** -Transition metal in +2 state
Explanation:
(A) : The general formula of the spinal is $\mathrm{AB}_{2} \mathrm{O}_{4}$ where, A represents divalent metal ion such as $\mathrm{Mg}, \mathrm{Fe}$, $\mathrm{Ni}, \mathrm{Mn}$ and $\mathrm{B}$ represents trivalent metal ion such as $\mathrm{Al}$, $\mathrm{Fe}, \mathrm{Cr}$, Ti, etc. Generally $\mathrm{MgAl}_{2} \mathrm{O}_{4}$ as spinal is mostly occur in nature.
AP - EAMCET(MEDICAL) - 2009
COORDINATION COMPOUNDS
274324
Elements $\mathrm{Se}, \mathrm{Cl}$ and $\mathrm{S}$ have been arranged in the order of increasing ionisation energies. Identify the correct order.
1 $\mathrm{S}<\mathrm{Se}<\mathrm{Cl}$
2 $\mathrm{Se}<\mathrm{S}<\mathrm{Cl}$
3 $\mathrm{Cl}<\mathrm{S}<\mathrm{Se}$
4 $\mathrm{Se}=\mathrm{S}<\mathrm{Cl}$
Explanation:
(B) : Ionisation energy generally increases from left to right across a row of the Periodic Table and decreases from top to bottom down a group. Hence, IE of $\mathrm{Cl}>\mathrm{S}$ and IE of $\mathrm{Se}<\mathrm{S}$. So, the order is $\mathrm{Se}<\mathrm{S}<\mathrm{Cl}$.
JCECE - 2013
COORDINATION COMPOUNDS
274325
In which of the following coordination entities the magnitude of $\Delta_{0}$ (CFSE in octahedral field) will be maximum?
(A) : The complex which has the high ligand field according to the spectrochemical series, having the greater CFSE in octahedral field. Here, CN ligand has more field due to Which $\left[\mathrm{CO}(\mathrm{CN})_{6}\right]^{3-}$ has more CFSE.
AIPMT -2008
COORDINATION COMPOUNDS
274264
A ligand can also be regarded as
1 Lewis acid
2 Bronsted base
3 Lewis base
4 Bronsted acid
Explanation:
(C) : A ligand is a species that is capable of donating an electron pair (s) to the central metal ion. The substances which are capable of donating an electron pair are called Lewis base, so a ligand is also a Lewis base.
