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COORDINATION COMPOUNDS

28670 Which compound is zero valent metal complex

1

[C u (N H_{3})_{4}] S O_{4}

2

[P t (N H_{3})_{2} C l_{2}]

3

[N i (C O)_{4}]

4

K_{3} [F e (C N)_{6}]

Explanation:

(a) $[C u {(N H_{3})}_{4}] S O_{4}$
Oxidation numbers of $C u :$
$x + 4 \times 0 - 2 = 0$
$x - 2 = 0$
$x = + 2$
(b) Oxidation number of $P t$ in $[P t {(N H_{3})}_{2} C l_{2}]$ $x + 2 \times 0 + 2 \times - 1 = 0$
$x - 2 = 0$
$x = + 2$
(c) Oxidation number of $N i$ in $[N i (C O)_{4}]$
$x + 4 \times 0 = 0$
$x = 0$
(d) Oxidation number of $F e in K_{3} [F e (C N)_{6}]$
$3 \times (+ 1) + x + 6 \times - 1 = 0$
$3 + x - 6 = 0$
$x = + 3$
$∴ [N i (C O)_{4}]$ is a zero-valent compound.
Hence, option $C$ is correct.

COORDINATION COMPOUNDS

28671 Which one of the following octahedral complexes will not show geometric isomerism ( $A$ and $B$ are monodentate ligands)

1

[M A_{5} B]

2

[M A_{2} B_{4}]

3

[M A_{3} B_{3}]

4

[M A_{4} B_{2}]

Explanation:

(a) Octahedral complexes of the type $[M A_{4} B_{2}], [M A_{2} B_{4}], [M A_{3} B_{3}]$ exhibit geometrical isomerism.

COORDINATION COMPOUNDS

28672 The number of unpaired electrons in the complex ion $[C o F_{6}]^{3 -}$ is (Atomic no. of $C o = 27)$

1

0

2

2

3

3

4

4

Explanation:

(d) The number of unpaired electrons in the Complex ion $[C o F_{6}]^{3 -}$ is $4.$

COORDINATION COMPOUNDS

28673 Which would exhibit co-ordination isomerism

1

[C r {(N H_{3})}_{6}] [C o {(C N)}_{6}]

2

[C o {(e n)}_{2} C l_{2}]

3

[C r {(N H_{3})}_{6}] C l_{3}

4

{[C r {(e n)}_{2} C l_{2}]}^{+}

COORDINATION COMPOUNDS

28674 $[C o {(N H_{3})}_{5} N O_{2}] C l_{2}$ and $[C o {(N H_{3})}_{5} (O N O)] C l_{2}$ are related to each other as

1 Geometrical isomers

2 Optical isomers

3 Linkage isomers

4 Coordination isomers

COORDINATION COMPOUNDS

28670 Which compound is zero valent metal complex

1

[C u (N H_{3})_{4}] S O_{4}

2

[P t (N H_{3})_{2} C l_{2}]

3

[N i (C O)_{4}]

4

K_{3} [F e (C N)_{6}]

Explanation:

(a) $[C u {(N H_{3})}_{4}] S O_{4}$
Oxidation numbers of $C u :$
$x + 4 \times 0 - 2 = 0$
$x - 2 = 0$
$x = + 2$
(b) Oxidation number of $P t$ in $[P t {(N H_{3})}_{2} C l_{2}]$ $x + 2 \times 0 + 2 \times - 1 = 0$
$x - 2 = 0$
$x = + 2$
(c) Oxidation number of $N i$ in $[N i (C O)_{4}]$
$x + 4 \times 0 = 0$
$x = 0$
(d) Oxidation number of $F e in K_{3} [F e (C N)_{6}]$
$3 \times (+ 1) + x + 6 \times - 1 = 0$
$3 + x - 6 = 0$
$x = + 3$
$∴ [N i (C O)_{4}]$ is a zero-valent compound.
Hence, option $C$ is correct.

COORDINATION COMPOUNDS

28671 Which one of the following octahedral complexes will not show geometric isomerism ( $A$ and $B$ are monodentate ligands)

1

[M A_{5} B]

2

[M A_{2} B_{4}]

3

[M A_{3} B_{3}]

4

[M A_{4} B_{2}]

Explanation:

(a) Octahedral complexes of the type $[M A_{4} B_{2}], [M A_{2} B_{4}], [M A_{3} B_{3}]$ exhibit geometrical isomerism.

COORDINATION COMPOUNDS

28672 The number of unpaired electrons in the complex ion $[C o F_{6}]^{3 -}$ is (Atomic no. of $C o = 27)$

1

0

2

2

3

3

4

4

Explanation:

(d) The number of unpaired electrons in the Complex ion $[C o F_{6}]^{3 -}$ is $4.$

COORDINATION COMPOUNDS

28673 Which would exhibit co-ordination isomerism

1

[C r {(N H_{3})}_{6}] [C o {(C N)}_{6}]

2

[C o {(e n)}_{2} C l_{2}]

3

[C r {(N H_{3})}_{6}] C l_{3}

4

{[C r {(e n)}_{2} C l_{2}]}^{+}

COORDINATION COMPOUNDS

28674 $[C o {(N H_{3})}_{5} N O_{2}] C l_{2}$ and $[C o {(N H_{3})}_{5} (O N O)] C l_{2}$ are related to each other as

1 Geometrical isomers

2 Optical isomers

3 Linkage isomers

4 Coordination isomers

COORDINATION COMPOUNDS

28670 Which compound is zero valent metal complex

1

[C u (N H_{3})_{4}] S O_{4}

2

[P t (N H_{3})_{2} C l_{2}]

3

[N i (C O)_{4}]

4

K_{3} [F e (C N)_{6}]

Explanation:

(a) $[C u {(N H_{3})}_{4}] S O_{4}$
Oxidation numbers of $C u :$
$x + 4 \times 0 - 2 = 0$
$x - 2 = 0$
$x = + 2$
(b) Oxidation number of $P t$ in $[P t {(N H_{3})}_{2} C l_{2}]$ $x + 2 \times 0 + 2 \times - 1 = 0$
$x - 2 = 0$
$x = + 2$
(c) Oxidation number of $N i$ in $[N i (C O)_{4}]$
$x + 4 \times 0 = 0$
$x = 0$
(d) Oxidation number of $F e in K_{3} [F e (C N)_{6}]$
$3 \times (+ 1) + x + 6 \times - 1 = 0$
$3 + x - 6 = 0$
$x = + 3$
$∴ [N i (C O)_{4}]$ is a zero-valent compound.
Hence, option $C$ is correct.

COORDINATION COMPOUNDS

28671 Which one of the following octahedral complexes will not show geometric isomerism ( $A$ and $B$ are monodentate ligands)

1

[M A_{5} B]

2

[M A_{2} B_{4}]

3

[M A_{3} B_{3}]

4

[M A_{4} B_{2}]

Explanation:

(a) Octahedral complexes of the type $[M A_{4} B_{2}], [M A_{2} B_{4}], [M A_{3} B_{3}]$ exhibit geometrical isomerism.

COORDINATION COMPOUNDS

28672 The number of unpaired electrons in the complex ion $[C o F_{6}]^{3 -}$ is (Atomic no. of $C o = 27)$

1

0

2

2

3

3

4

4

Explanation:

(d) The number of unpaired electrons in the Complex ion $[C o F_{6}]^{3 -}$ is $4.$

COORDINATION COMPOUNDS

28673 Which would exhibit co-ordination isomerism

1

[C r {(N H_{3})}_{6}] [C o {(C N)}_{6}]

2

[C o {(e n)}_{2} C l_{2}]

3

[C r {(N H_{3})}_{6}] C l_{3}

4

{[C r {(e n)}_{2} C l_{2}]}^{+}

COORDINATION COMPOUNDS

28674 $[C o {(N H_{3})}_{5} N O_{2}] C l_{2}$ and $[C o {(N H_{3})}_{5} (O N O)] C l_{2}$ are related to each other as

1 Geometrical isomers

2 Optical isomers

3 Linkage isomers

4 Coordination isomers

COORDINATION COMPOUNDS

28670 Which compound is zero valent metal complex

1

[C u (N H_{3})_{4}] S O_{4}

2

[P t (N H_{3})_{2} C l_{2}]

3

[N i (C O)_{4}]

4

K_{3} [F e (C N)_{6}]

Explanation:

(a) $[C u {(N H_{3})}_{4}] S O_{4}$
Oxidation numbers of $C u :$
$x + 4 \times 0 - 2 = 0$
$x - 2 = 0$
$x = + 2$
(b) Oxidation number of $P t$ in $[P t {(N H_{3})}_{2} C l_{2}]$ $x + 2 \times 0 + 2 \times - 1 = 0$
$x - 2 = 0$
$x = + 2$
(c) Oxidation number of $N i$ in $[N i (C O)_{4}]$
$x + 4 \times 0 = 0$
$x = 0$
(d) Oxidation number of $F e in K_{3} [F e (C N)_{6}]$
$3 \times (+ 1) + x + 6 \times - 1 = 0$
$3 + x - 6 = 0$
$x = + 3$
$∴ [N i (C O)_{4}]$ is a zero-valent compound.
Hence, option $C$ is correct.

COORDINATION COMPOUNDS

28671 Which one of the following octahedral complexes will not show geometric isomerism ( $A$ and $B$ are monodentate ligands)

1

[M A_{5} B]

2

[M A_{2} B_{4}]

3

[M A_{3} B_{3}]

4

[M A_{4} B_{2}]

Explanation:

(a) Octahedral complexes of the type $[M A_{4} B_{2}], [M A_{2} B_{4}], [M A_{3} B_{3}]$ exhibit geometrical isomerism.

COORDINATION COMPOUNDS

28672 The number of unpaired electrons in the complex ion $[C o F_{6}]^{3 -}$ is (Atomic no. of $C o = 27)$

1

0

2

2

3

3

4

4

Explanation:

(d) The number of unpaired electrons in the Complex ion $[C o F_{6}]^{3 -}$ is $4.$

COORDINATION COMPOUNDS

28673 Which would exhibit co-ordination isomerism

1

[C r {(N H_{3})}_{6}] [C o {(C N)}_{6}]

2

[C o {(e n)}_{2} C l_{2}]

3

[C r {(N H_{3})}_{6}] C l_{3}

4

{[C r {(e n)}_{2} C l_{2}]}^{+}

COORDINATION COMPOUNDS

28674 $[C o {(N H_{3})}_{5} N O_{2}] C l_{2}$ and $[C o {(N H_{3})}_{5} (O N O)] C l_{2}$ are related to each other as

1 Geometrical isomers

2 Optical isomers

3 Linkage isomers

4 Coordination isomers

COORDINATION COMPOUNDS

28670 Which compound is zero valent metal complex

1

[C u (N H_{3})_{4}] S O_{4}

2

[P t (N H_{3})_{2} C l_{2}]

3

[N i (C O)_{4}]

4

K_{3} [F e (C N)_{6}]

Explanation:

(a) $[C u {(N H_{3})}_{4}] S O_{4}$
Oxidation numbers of $C u :$
$x + 4 \times 0 - 2 = 0$
$x - 2 = 0$
$x = + 2$
(b) Oxidation number of $P t$ in $[P t {(N H_{3})}_{2} C l_{2}]$ $x + 2 \times 0 + 2 \times - 1 = 0$
$x - 2 = 0$
$x = + 2$
(c) Oxidation number of $N i$ in $[N i (C O)_{4}]$
$x + 4 \times 0 = 0$
$x = 0$
(d) Oxidation number of $F e in K_{3} [F e (C N)_{6}]$
$3 \times (+ 1) + x + 6 \times - 1 = 0$
$3 + x - 6 = 0$
$x = + 3$
$∴ [N i (C O)_{4}]$ is a zero-valent compound.
Hence, option $C$ is correct.

COORDINATION COMPOUNDS

28671 Which one of the following octahedral complexes will not show geometric isomerism ( $A$ and $B$ are monodentate ligands)

1

[M A_{5} B]

2

[M A_{2} B_{4}]

3

[M A_{3} B_{3}]

4

[M A_{4} B_{2}]

Explanation:

(a) Octahedral complexes of the type $[M A_{4} B_{2}], [M A_{2} B_{4}], [M A_{3} B_{3}]$ exhibit geometrical isomerism.

COORDINATION COMPOUNDS

28672 The number of unpaired electrons in the complex ion $[C o F_{6}]^{3 -}$ is (Atomic no. of $C o = 27)$

1

0

2

2

3

3

4

4

Explanation:

(d) The number of unpaired electrons in the Complex ion $[C o F_{6}]^{3 -}$ is $4.$

COORDINATION COMPOUNDS

28673 Which would exhibit co-ordination isomerism

1

[C r {(N H_{3})}_{6}] [C o {(C N)}_{6}]

2

[C o {(e n)}_{2} C l_{2}]

3

[C r {(N H_{3})}_{6}] C l_{3}

4

{[C r {(e n)}_{2} C l_{2}]}^{+}

COORDINATION COMPOUNDS

28674 $[C o {(N H_{3})}_{5} N O_{2}] C l_{2}$ and $[C o {(N H_{3})}_{5} (O N O)] C l_{2}$ are related to each other as

1 Geometrical isomers

2 Optical isomers

3 Linkage isomers

4 Coordination isomers