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COORDINATION COMPOUNDS

28792 Among the following, which is not the $π$ -bonded organometallic compound

1

(C H_{3})_{4} S n

2

K [P t C l_{3} (η^{2} - C_{2} H_{4})]

3

F e (η^{5} - C_{5} H_{5})_{2}

4

C r (η^{6} - C_{6} H_{6})_{2}

Explanation:

(a) $(C H_{3})_{4} S n$ is a $σ -$ bonded organometallic compound.

COORDINATION COMPOUNDS

28658 In which of the following compounds transition metal has zero oxidation state

1

C r O_{5}

2

N H_{2} . N H_{2}

3

N O C l O_{4}

4

[F e {(C O)}_{5}]

Explanation:

$(1)$ In option $B$ AND $C$ there is no transition metals so elimimated
$(2)$ In $[F e (C O)_{5}]$ carbon monoxide is a natural ligand, therefore no involvement of $F$ e electrons in complex, $F$ e has zero oxidation state.

COORDINATION COMPOUNDS

28659 The complex chlorocompound diaquatriammine cobalt $(I I I)$ chloride is represented as

1

[C o (N H_{3})_{3} (H_{2} O)_{3}] C l_{2}

2

[C o (N H_{2})_{3} (H_{2} O)_{2}] C l_{2}

3

[C o C l (N H_{3})_{3} (H_{2} O)_{2}] C l_{3}

4

[C o C l (N H_{3})_{3} (H_{2} O)_{2}] C l_{2}

Explanation:

Chlorodiaquatriamminecobalt $(I I I)$ chloride is $[C o C l {(N H_{3})}_{3} {(H_{2} O)}_{2}] C l_{2}$ . Since.Co has $+ 3$ charge so 2 chloride ion will be out of the complex ion and 1 within the complex to satisfy primary valency.

COORDINATION COMPOUNDS

28660 The complex compound $[C o {(N H_{3})}_{3} N O_{2} C l C N]$ is named as

1 triamminechlorocyanonitro cobalt

(I I I)

2 Nitrochlorocyanotriammine cobalt

(I I I)

3 Cyanonitrochlorotriammine cobalt

(I I I)

4 Triamminenitrochlorocyano cobalt

(I I I)

Explanation:

(a)Follow $I U P A C$ rule.

COORDINATION COMPOUNDS

28661 The oxidation number of $P t$ in $[P t (C_{2} H_{4}) C l_{3}]^{-}$ is

1

+ 1

2

+ 2

3

+ 3

4

+ 4

Explanation:

Let $x$ be the oxidation state of $P t$ in ${[P t (C_{2} H_{4}) C l_{3}]}^{-}$ .
Since the overall charge on the complex is $- 1$ , the sum of oxidation states of all elements in it should be equal to $- 1$ .
Therefore, $x + 0 - 3 = - 1$
or, $x = + 2$

COORDINATION COMPOUNDS

28792 Among the following, which is not the $π$ -bonded organometallic compound

1

(C H_{3})_{4} S n

2

K [P t C l_{3} (η^{2} - C_{2} H_{4})]

3

F e (η^{5} - C_{5} H_{5})_{2}

4

C r (η^{6} - C_{6} H_{6})_{2}

Explanation:

(a) $(C H_{3})_{4} S n$ is a $σ -$ bonded organometallic compound.

COORDINATION COMPOUNDS

28658 In which of the following compounds transition metal has zero oxidation state

1

C r O_{5}

2

N H_{2} . N H_{2}

3

N O C l O_{4}

4

[F e {(C O)}_{5}]

Explanation:

$(1)$ In option $B$ AND $C$ there is no transition metals so elimimated
$(2)$ In $[F e (C O)_{5}]$ carbon monoxide is a natural ligand, therefore no involvement of $F$ e electrons in complex, $F$ e has zero oxidation state.

COORDINATION COMPOUNDS

28659 The complex chlorocompound diaquatriammine cobalt $(I I I)$ chloride is represented as

1

[C o (N H_{3})_{3} (H_{2} O)_{3}] C l_{2}

2

[C o (N H_{2})_{3} (H_{2} O)_{2}] C l_{2}

3

[C o C l (N H_{3})_{3} (H_{2} O)_{2}] C l_{3}

4

[C o C l (N H_{3})_{3} (H_{2} O)_{2}] C l_{2}

Explanation:

Chlorodiaquatriamminecobalt $(I I I)$ chloride is $[C o C l {(N H_{3})}_{3} {(H_{2} O)}_{2}] C l_{2}$ . Since.Co has $+ 3$ charge so 2 chloride ion will be out of the complex ion and 1 within the complex to satisfy primary valency.

COORDINATION COMPOUNDS

28660 The complex compound $[C o {(N H_{3})}_{3} N O_{2} C l C N]$ is named as

1 triamminechlorocyanonitro cobalt

(I I I)

2 Nitrochlorocyanotriammine cobalt

(I I I)

3 Cyanonitrochlorotriammine cobalt

(I I I)

4 Triamminenitrochlorocyano cobalt

(I I I)

Explanation:

(a)Follow $I U P A C$ rule.

COORDINATION COMPOUNDS

28661 The oxidation number of $P t$ in $[P t (C_{2} H_{4}) C l_{3}]^{-}$ is

1

+ 1

2

+ 2

3

+ 3

4

+ 4

Explanation:

Let $x$ be the oxidation state of $P t$ in ${[P t (C_{2} H_{4}) C l_{3}]}^{-}$ .
Since the overall charge on the complex is $- 1$ , the sum of oxidation states of all elements in it should be equal to $- 1$ .
Therefore, $x + 0 - 3 = - 1$
or, $x = + 2$

COORDINATION COMPOUNDS

28792 Among the following, which is not the $π$ -bonded organometallic compound

1

(C H_{3})_{4} S n

2

K [P t C l_{3} (η^{2} - C_{2} H_{4})]

3

F e (η^{5} - C_{5} H_{5})_{2}

4

C r (η^{6} - C_{6} H_{6})_{2}

Explanation:

(a) $(C H_{3})_{4} S n$ is a $σ -$ bonded organometallic compound.

COORDINATION COMPOUNDS

28658 In which of the following compounds transition metal has zero oxidation state

1

C r O_{5}

2

N H_{2} . N H_{2}

3

N O C l O_{4}

4

[F e {(C O)}_{5}]

Explanation:

$(1)$ In option $B$ AND $C$ there is no transition metals so elimimated
$(2)$ In $[F e (C O)_{5}]$ carbon monoxide is a natural ligand, therefore no involvement of $F$ e electrons in complex, $F$ e has zero oxidation state.

COORDINATION COMPOUNDS

28659 The complex chlorocompound diaquatriammine cobalt $(I I I)$ chloride is represented as

1

[C o (N H_{3})_{3} (H_{2} O)_{3}] C l_{2}

2

[C o (N H_{2})_{3} (H_{2} O)_{2}] C l_{2}

3

[C o C l (N H_{3})_{3} (H_{2} O)_{2}] C l_{3}

4

[C o C l (N H_{3})_{3} (H_{2} O)_{2}] C l_{2}

Explanation:

Chlorodiaquatriamminecobalt $(I I I)$ chloride is $[C o C l {(N H_{3})}_{3} {(H_{2} O)}_{2}] C l_{2}$ . Since.Co has $+ 3$ charge so 2 chloride ion will be out of the complex ion and 1 within the complex to satisfy primary valency.

COORDINATION COMPOUNDS

28660 The complex compound $[C o {(N H_{3})}_{3} N O_{2} C l C N]$ is named as

1 triamminechlorocyanonitro cobalt

(I I I)

2 Nitrochlorocyanotriammine cobalt

(I I I)

3 Cyanonitrochlorotriammine cobalt

(I I I)

4 Triamminenitrochlorocyano cobalt

(I I I)

Explanation:

(a)Follow $I U P A C$ rule.

COORDINATION COMPOUNDS

28661 The oxidation number of $P t$ in $[P t (C_{2} H_{4}) C l_{3}]^{-}$ is

1

+ 1

2

+ 2

3

+ 3

4

+ 4

Explanation:

Let $x$ be the oxidation state of $P t$ in ${[P t (C_{2} H_{4}) C l_{3}]}^{-}$ .
Since the overall charge on the complex is $- 1$ , the sum of oxidation states of all elements in it should be equal to $- 1$ .
Therefore, $x + 0 - 3 = - 1$
or, $x = + 2$

COORDINATION COMPOUNDS

28792 Among the following, which is not the $π$ -bonded organometallic compound

1

(C H_{3})_{4} S n

2

K [P t C l_{3} (η^{2} - C_{2} H_{4})]

3

F e (η^{5} - C_{5} H_{5})_{2}

4

C r (η^{6} - C_{6} H_{6})_{2}

Explanation:

(a) $(C H_{3})_{4} S n$ is a $σ -$ bonded organometallic compound.

COORDINATION COMPOUNDS

28658 In which of the following compounds transition metal has zero oxidation state

1

C r O_{5}

2

N H_{2} . N H_{2}

3

N O C l O_{4}

4

[F e {(C O)}_{5}]

Explanation:

$(1)$ In option $B$ AND $C$ there is no transition metals so elimimated
$(2)$ In $[F e (C O)_{5}]$ carbon monoxide is a natural ligand, therefore no involvement of $F$ e electrons in complex, $F$ e has zero oxidation state.

COORDINATION COMPOUNDS

28659 The complex chlorocompound diaquatriammine cobalt $(I I I)$ chloride is represented as

1

[C o (N H_{3})_{3} (H_{2} O)_{3}] C l_{2}

2

[C o (N H_{2})_{3} (H_{2} O)_{2}] C l_{2}

3

[C o C l (N H_{3})_{3} (H_{2} O)_{2}] C l_{3}

4

[C o C l (N H_{3})_{3} (H_{2} O)_{2}] C l_{2}

Explanation:

Chlorodiaquatriamminecobalt $(I I I)$ chloride is $[C o C l {(N H_{3})}_{3} {(H_{2} O)}_{2}] C l_{2}$ . Since.Co has $+ 3$ charge so 2 chloride ion will be out of the complex ion and 1 within the complex to satisfy primary valency.

COORDINATION COMPOUNDS

28660 The complex compound $[C o {(N H_{3})}_{3} N O_{2} C l C N]$ is named as

1 triamminechlorocyanonitro cobalt

(I I I)

2 Nitrochlorocyanotriammine cobalt

(I I I)

3 Cyanonitrochlorotriammine cobalt

(I I I)

4 Triamminenitrochlorocyano cobalt

(I I I)

Explanation:

(a)Follow $I U P A C$ rule.

COORDINATION COMPOUNDS

28661 The oxidation number of $P t$ in $[P t (C_{2} H_{4}) C l_{3}]^{-}$ is

1

+ 1

2

+ 2

3

+ 3

4

+ 4

Explanation:

Let $x$ be the oxidation state of $P t$ in ${[P t (C_{2} H_{4}) C l_{3}]}^{-}$ .
Since the overall charge on the complex is $- 1$ , the sum of oxidation states of all elements in it should be equal to $- 1$ .
Therefore, $x + 0 - 3 = - 1$
or, $x = + 2$

COORDINATION COMPOUNDS

28792 Among the following, which is not the $π$ -bonded organometallic compound

1

(C H_{3})_{4} S n

2

K [P t C l_{3} (η^{2} - C_{2} H_{4})]

3

F e (η^{5} - C_{5} H_{5})_{2}

4

C r (η^{6} - C_{6} H_{6})_{2}

Explanation:

(a) $(C H_{3})_{4} S n$ is a $σ -$ bonded organometallic compound.

COORDINATION COMPOUNDS

28658 In which of the following compounds transition metal has zero oxidation state

1

C r O_{5}

2

N H_{2} . N H_{2}

3

N O C l O_{4}

4

[F e {(C O)}_{5}]

Explanation:

$(1)$ In option $B$ AND $C$ there is no transition metals so elimimated
$(2)$ In $[F e (C O)_{5}]$ carbon monoxide is a natural ligand, therefore no involvement of $F$ e electrons in complex, $F$ e has zero oxidation state.

COORDINATION COMPOUNDS

28659 The complex chlorocompound diaquatriammine cobalt $(I I I)$ chloride is represented as

1

[C o (N H_{3})_{3} (H_{2} O)_{3}] C l_{2}

2

[C o (N H_{2})_{3} (H_{2} O)_{2}] C l_{2}

3

[C o C l (N H_{3})_{3} (H_{2} O)_{2}] C l_{3}

4

[C o C l (N H_{3})_{3} (H_{2} O)_{2}] C l_{2}

Explanation:

Chlorodiaquatriamminecobalt $(I I I)$ chloride is $[C o C l {(N H_{3})}_{3} {(H_{2} O)}_{2}] C l_{2}$ . Since.Co has $+ 3$ charge so 2 chloride ion will be out of the complex ion and 1 within the complex to satisfy primary valency.

COORDINATION COMPOUNDS

28660 The complex compound $[C o {(N H_{3})}_{3} N O_{2} C l C N]$ is named as

1 triamminechlorocyanonitro cobalt

(I I I)

2 Nitrochlorocyanotriammine cobalt

(I I I)

3 Cyanonitrochlorotriammine cobalt

(I I I)

4 Triamminenitrochlorocyano cobalt

(I I I)

Explanation:

(a)Follow $I U P A C$ rule.

COORDINATION COMPOUNDS

28661 The oxidation number of $P t$ in $[P t (C_{2} H_{4}) C l_{3}]^{-}$ is

1

+ 1

2

+ 2

3

+ 3

4

+ 4

Explanation:

Let $x$ be the oxidation state of $P t$ in ${[P t (C_{2} H_{4}) C l_{3}]}^{-}$ .
Since the overall charge on the complex is $- 1$ , the sum of oxidation states of all elements in it should be equal to $- 1$ .
Therefore, $x + 0 - 3 = - 1$
or, $x = + 2$

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