QBManager

COORDINATION COMPOUNDS

274193 The donor atom in EDTA are

1 Two

N

and two

O

2 Two

N

and Four

O

3 Four

N

and two

O

4 Three

N

and three

O

5 Two

N

and three

O

Explanation:

(B) : The donar atom of EDTA is -
Two $N$ atom and four $O$ atom.
original image
Ethylene diamine tetraacetic acid

Kerala-CEE-2019

COORDINATION COMPOUNDS

274196 In $Fe (CO)_{5}$ , the $Fe - C$ bond possesses

1 ionic character

2

σ

- character only

3

π

- character

4 both

σ

and

π

characters

Explanation:

(D) : $In Fe (CO)_{5}$ , the $Fe - C$ bond possesses both $σ$ and $π$ character.
original image
$σ$ -bond formed due
to donation of $C$ to $Fe$

AIIMS 25 May 2019 (Evening)

COORDINATION COMPOUNDS

274198 Which of the following carbonyls will have the strongest $C - O$ bond?

1

{[Mn (CO)_{6}]}^{+}

2

[Cr (CO)_{6}]

3

[V (CO) 6]^{-}

4

[Fe (CO)_{5}]

Explanation:

(A) : Bond strength of C.O bond $\propto \frac{1}{Back - bonding}$
Back bonding $\propto$ Electron density of metal
$\propto \frac{Negative Charge on metal}{Positive Charge on metal}$
If metal having more electron density then it donates more lone pair of electron to carbon atom of $CO$ group. Metal donate from filled orbital to vacant $π^{*}$ orbital of carbon due to which bond strength decreases. Hence, $[Mn (CO)_{6}]$ will have the strongest $C - O$ bond because here tendency of back bonding is less.

BITSAT-2019

COORDINATION COMPOUNDS

274199 Which of the following ligands can act as an ambidentate ligand?

1

{NO}_{2}^{-}

2

{Cl}^{-}

3

C_{2} O_{4}^{2 -}

4

{CN}^{-}

Explanation:

,d)
Exp: (A, D) : Those ligands which has two different donor atoms but at a time only one donor atom is attached with metal.
${CN}^{-}$ is an example of ambidentate ligand.
$M ⟵ CN$
$M ⟵ NC$
Cyanido
Isocyanido

J and K CET-(2019)

COORDINATION COMPOUNDS

274193 The donor atom in EDTA are

1 Two

N

and two

O

2 Two

N

and Four

O

3 Four

N

and two

O

4 Three

N

and three

O

5 Two

N

and three

O

Explanation:

(B) : The donar atom of EDTA is -
Two $N$ atom and four $O$ atom.
original image
Ethylene diamine tetraacetic acid

Kerala-CEE-2019

COORDINATION COMPOUNDS

274196 In $Fe (CO)_{5}$ , the $Fe - C$ bond possesses

1 ionic character

2

σ

- character only

3

π

- character

4 both

σ

and

π

characters

Explanation:

(D) : $In Fe (CO)_{5}$ , the $Fe - C$ bond possesses both $σ$ and $π$ character.
original image
$σ$ -bond formed due
to donation of $C$ to $Fe$

AIIMS 25 May 2019 (Evening)

COORDINATION COMPOUNDS

274198 Which of the following carbonyls will have the strongest $C - O$ bond?

1

{[Mn (CO)_{6}]}^{+}

2

[Cr (CO)_{6}]

3

[V (CO) 6]^{-}

4

[Fe (CO)_{5}]

Explanation:

(A) : Bond strength of C.O bond $\propto \frac{1}{Back - bonding}$
Back bonding $\propto$ Electron density of metal
$\propto \frac{Negative Charge on metal}{Positive Charge on metal}$
If metal having more electron density then it donates more lone pair of electron to carbon atom of $CO$ group. Metal donate from filled orbital to vacant $π^{*}$ orbital of carbon due to which bond strength decreases. Hence, $[Mn (CO)_{6}]$ will have the strongest $C - O$ bond because here tendency of back bonding is less.

BITSAT-2019

COORDINATION COMPOUNDS

274199 Which of the following ligands can act as an ambidentate ligand?

1

{NO}_{2}^{-}

2

{Cl}^{-}

3

C_{2} O_{4}^{2 -}

4

{CN}^{-}

Explanation:

,d)
Exp: (A, D) : Those ligands which has two different donor atoms but at a time only one donor atom is attached with metal.
${CN}^{-}$ is an example of ambidentate ligand.
$M ⟵ CN$
$M ⟵ NC$
Cyanido
Isocyanido

J and K CET-(2019)

COORDINATION COMPOUNDS

274193 The donor atom in EDTA are

1 Two

N

and two

O

2 Two

N

and Four

O

3 Four

N

and two

O

4 Three

N

and three

O

5 Two

N

and three

O

Explanation:

(B) : The donar atom of EDTA is -
Two $N$ atom and four $O$ atom.
original image
Ethylene diamine tetraacetic acid

Kerala-CEE-2019

COORDINATION COMPOUNDS

274196 In $Fe (CO)_{5}$ , the $Fe - C$ bond possesses

1 ionic character

2

σ

- character only

3

π

- character

4 both

σ

and

π

characters

Explanation:

(D) : $In Fe (CO)_{5}$ , the $Fe - C$ bond possesses both $σ$ and $π$ character.
original image
$σ$ -bond formed due
to donation of $C$ to $Fe$

AIIMS 25 May 2019 (Evening)

COORDINATION COMPOUNDS

274198 Which of the following carbonyls will have the strongest $C - O$ bond?

1

{[Mn (CO)_{6}]}^{+}

2

[Cr (CO)_{6}]

3

[V (CO) 6]^{-}

4

[Fe (CO)_{5}]

Explanation:

(A) : Bond strength of C.O bond $\propto \frac{1}{Back - bonding}$
Back bonding $\propto$ Electron density of metal
$\propto \frac{Negative Charge on metal}{Positive Charge on metal}$
If metal having more electron density then it donates more lone pair of electron to carbon atom of $CO$ group. Metal donate from filled orbital to vacant $π^{*}$ orbital of carbon due to which bond strength decreases. Hence, $[Mn (CO)_{6}]$ will have the strongest $C - O$ bond because here tendency of back bonding is less.

BITSAT-2019

COORDINATION COMPOUNDS

274199 Which of the following ligands can act as an ambidentate ligand?

1

{NO}_{2}^{-}

2

{Cl}^{-}

3

C_{2} O_{4}^{2 -}

4

{CN}^{-}

Explanation:

,d)
Exp: (A, D) : Those ligands which has two different donor atoms but at a time only one donor atom is attached with metal.
${CN}^{-}$ is an example of ambidentate ligand.
$M ⟵ CN$
$M ⟵ NC$
Cyanido
Isocyanido

J and K CET-(2019)

COORDINATION COMPOUNDS

274193 The donor atom in EDTA are

1 Two

N

and two

O

2 Two

N

and Four

O

3 Four

N

and two

O

4 Three

N

and three

O

5 Two

N

and three

O

Explanation:

(B) : The donar atom of EDTA is -
Two $N$ atom and four $O$ atom.
original image
Ethylene diamine tetraacetic acid

Kerala-CEE-2019

COORDINATION COMPOUNDS

274196 In $Fe (CO)_{5}$ , the $Fe - C$ bond possesses

1 ionic character

2

σ

- character only

3

π

- character

4 both

σ

and

π

characters

Explanation:

(D) : $In Fe (CO)_{5}$ , the $Fe - C$ bond possesses both $σ$ and $π$ character.
original image
$σ$ -bond formed due
to donation of $C$ to $Fe$

AIIMS 25 May 2019 (Evening)

COORDINATION COMPOUNDS

274198 Which of the following carbonyls will have the strongest $C - O$ bond?

1

{[Mn (CO)_{6}]}^{+}

2

[Cr (CO)_{6}]

3

[V (CO) 6]^{-}

4

[Fe (CO)_{5}]

Explanation:

(A) : Bond strength of C.O bond $\propto \frac{1}{Back - bonding}$
Back bonding $\propto$ Electron density of metal
$\propto \frac{Negative Charge on metal}{Positive Charge on metal}$
If metal having more electron density then it donates more lone pair of electron to carbon atom of $CO$ group. Metal donate from filled orbital to vacant $π^{*}$ orbital of carbon due to which bond strength decreases. Hence, $[Mn (CO)_{6}]$ will have the strongest $C - O$ bond because here tendency of back bonding is less.

BITSAT-2019

COORDINATION COMPOUNDS

274199 Which of the following ligands can act as an ambidentate ligand?

1

{NO}_{2}^{-}

2

{Cl}^{-}

3

C_{2} O_{4}^{2 -}

4

{CN}^{-}

Explanation:

,d)
Exp: (A, D) : Those ligands which has two different donor atoms but at a time only one donor atom is attached with metal.
${CN}^{-}$ is an example of ambidentate ligand.
$M ⟵ CN$
$M ⟵ NC$
Cyanido
Isocyanido

J and K CET-(2019)

Explanation:

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