QBManager

COORDINATION COMPOUNDS

274421 A violet colour compound is forms in detection of ' $S$ ' in a compound

1

{Na}_{4} [Fe (CN)_{5} NOS]

2

{Na}_{3} [Fe (CN)_{5} NOS]

3

{Na}_{2} [Fe (CN)_{5} NOS]

4

{Na}_{2} [Fe (CN)_{5} NO]

Explanation:

(A) : When ${Na}_{2} S$ is mixed with freshly prepared sodium nitroprusside, a deep violet colour indicates the presence of sulphur.
${Na}_{2} S + {Na}_{2} [Fe (NO) (CN)_{5}] ⟶ {Na}_{4} [(Fe (CN)_{5}) NOS]$
$Sodium nitroprusside Sodium thionitroprusside$

UP CPMT-2006

COORDINATION COMPOUNDS

274422 Which of the following metal ions is not coloured?

1

{Ti}^{3 +}

2

{Fe}^{3 +}

3

V^{2 +}

4

{Zn}^{2 +}

Explanation:

(D) : ${Zn}^{2 +} : (3 d^{10})$ has no unpaired electron. So it is colourless.
${Zn}^{2 +}$ is a divalent metal cation, a zinc cation and a monoatomic dication. It has a role as a human metabolite and cofactor.

UPTU/UPSEE-2006

COORDINATION COMPOUNDS

274423 Copper sulphate solution, When added to an excess of amonium hydroxide, forms a complex compound due to:

1

{[Cu {({NH}_{3})}_{2}]}^{2 +}

2

{[Cu {({NH}_{3})}_{4}]}^{2 +}

3

{[Cu {({NH}_{3})}_{6}]}^{2 +}

4

{Cu}^{2 +}

Explanation:

(B) :
${CuSO}_{4} + {NH}_{4} OH \to Cu [{({NH}_{3})}_{4}] {SO}_{4} + 4 H_{2} O$
${CuSO}_{4} + {NH}_{4} OH \to Cu {[{({NH}_{3})}_{4}]}^{2 +} + 4 H_{2} O$

UPTU/UPSEE-2005

COORDINATION COMPOUNDS

274424 Manganese salt $+ {PbO}_{2} +$ conc. ${HNO}_{3} \to$ the solution acquires purple colour. The colour is due to.

1

Mn {({NO}_{3})}_{2}

2

Pb {({NO}_{3})}_{2}

3

{HMnO}_{4}

4

MnO

Explanation:

(C) : The manganese salt is ${MnO}_{2}$
$2 {MnO}_{2} + 4 {HNO}_{3} ⟶ 2 Mn {({NO}_{3})}_{2} + 2 H_{2} O + O_{2}$
$2 Mn {({NO}_{3})}_{2} + 5 {PbO}_{2} + 6 {HNO}_{3} ⟶ 2 {HMnO}_{4} + 5 Pb ({NO}_{3}) + 2 H_{2} O$
Permangaic acid (Niolet pink)

UPTU/UPSEE-2013

COORDINATION COMPOUNDS

274383 Which of the following compound is not coloured?

1

{Na}_{2} CuCl

2

{Na}_{2} Cd \cdot {Cl}_{4}

3

{FeSO}_{4}

4

{VI}_{3}

Explanation:

(B) : ${Na}_{2} [Cd . {Cl}_{4}]$ has no unpaired electron due to presence of $d^{10}$ electrons. ${Cd}^{2 +}$ is a colourless compound.

JIPMER-2017

COORDINATION COMPOUNDS

274421 A violet colour compound is forms in detection of ' $S$ ' in a compound

1

{Na}_{4} [Fe (CN)_{5} NOS]

2

{Na}_{3} [Fe (CN)_{5} NOS]

3

{Na}_{2} [Fe (CN)_{5} NOS]

4

{Na}_{2} [Fe (CN)_{5} NO]

Explanation:

(A) : When ${Na}_{2} S$ is mixed with freshly prepared sodium nitroprusside, a deep violet colour indicates the presence of sulphur.
${Na}_{2} S + {Na}_{2} [Fe (NO) (CN)_{5}] ⟶ {Na}_{4} [(Fe (CN)_{5}) NOS]$
$Sodium nitroprusside Sodium thionitroprusside$

UP CPMT-2006

COORDINATION COMPOUNDS

274422 Which of the following metal ions is not coloured?

1

{Ti}^{3 +}

2

{Fe}^{3 +}

3

V^{2 +}

4

{Zn}^{2 +}

Explanation:

(D) : ${Zn}^{2 +} : (3 d^{10})$ has no unpaired electron. So it is colourless.
${Zn}^{2 +}$ is a divalent metal cation, a zinc cation and a monoatomic dication. It has a role as a human metabolite and cofactor.

UPTU/UPSEE-2006

COORDINATION COMPOUNDS

274423 Copper sulphate solution, When added to an excess of amonium hydroxide, forms a complex compound due to:

1

{[Cu {({NH}_{3})}_{2}]}^{2 +}

2

{[Cu {({NH}_{3})}_{4}]}^{2 +}

3

{[Cu {({NH}_{3})}_{6}]}^{2 +}

4

{Cu}^{2 +}

Explanation:

(B) :
${CuSO}_{4} + {NH}_{4} OH \to Cu [{({NH}_{3})}_{4}] {SO}_{4} + 4 H_{2} O$
${CuSO}_{4} + {NH}_{4} OH \to Cu {[{({NH}_{3})}_{4}]}^{2 +} + 4 H_{2} O$

UPTU/UPSEE-2005

COORDINATION COMPOUNDS

274424 Manganese salt $+ {PbO}_{2} +$ conc. ${HNO}_{3} \to$ the solution acquires purple colour. The colour is due to.

1

Mn {({NO}_{3})}_{2}

2

Pb {({NO}_{3})}_{2}

3

{HMnO}_{4}

4

MnO

Explanation:

(C) : The manganese salt is ${MnO}_{2}$
$2 {MnO}_{2} + 4 {HNO}_{3} ⟶ 2 Mn {({NO}_{3})}_{2} + 2 H_{2} O + O_{2}$
$2 Mn {({NO}_{3})}_{2} + 5 {PbO}_{2} + 6 {HNO}_{3} ⟶ 2 {HMnO}_{4} + 5 Pb ({NO}_{3}) + 2 H_{2} O$
Permangaic acid (Niolet pink)

UPTU/UPSEE-2013

COORDINATION COMPOUNDS

274383 Which of the following compound is not coloured?

1

{Na}_{2} CuCl

2

{Na}_{2} Cd \cdot {Cl}_{4}

3

{FeSO}_{4}

4

{VI}_{3}

Explanation:

(B) : ${Na}_{2} [Cd . {Cl}_{4}]$ has no unpaired electron due to presence of $d^{10}$ electrons. ${Cd}^{2 +}$ is a colourless compound.

JIPMER-2017

COORDINATION COMPOUNDS

274421 A violet colour compound is forms in detection of ' $S$ ' in a compound

1

{Na}_{4} [Fe (CN)_{5} NOS]

2

{Na}_{3} [Fe (CN)_{5} NOS]

3

{Na}_{2} [Fe (CN)_{5} NOS]

4

{Na}_{2} [Fe (CN)_{5} NO]

Explanation:

(A) : When ${Na}_{2} S$ is mixed with freshly prepared sodium nitroprusside, a deep violet colour indicates the presence of sulphur.
${Na}_{2} S + {Na}_{2} [Fe (NO) (CN)_{5}] ⟶ {Na}_{4} [(Fe (CN)_{5}) NOS]$
$Sodium nitroprusside Sodium thionitroprusside$

UP CPMT-2006

COORDINATION COMPOUNDS

274422 Which of the following metal ions is not coloured?

1

{Ti}^{3 +}

2

{Fe}^{3 +}

3

V^{2 +}

4

{Zn}^{2 +}

Explanation:

(D) : ${Zn}^{2 +} : (3 d^{10})$ has no unpaired electron. So it is colourless.
${Zn}^{2 +}$ is a divalent metal cation, a zinc cation and a monoatomic dication. It has a role as a human metabolite and cofactor.

UPTU/UPSEE-2006

COORDINATION COMPOUNDS

274423 Copper sulphate solution, When added to an excess of amonium hydroxide, forms a complex compound due to:

1

{[Cu {({NH}_{3})}_{2}]}^{2 +}

2

{[Cu {({NH}_{3})}_{4}]}^{2 +}

3

{[Cu {({NH}_{3})}_{6}]}^{2 +}

4

{Cu}^{2 +}

Explanation:

(B) :
${CuSO}_{4} + {NH}_{4} OH \to Cu [{({NH}_{3})}_{4}] {SO}_{4} + 4 H_{2} O$
${CuSO}_{4} + {NH}_{4} OH \to Cu {[{({NH}_{3})}_{4}]}^{2 +} + 4 H_{2} O$

UPTU/UPSEE-2005

COORDINATION COMPOUNDS

274424 Manganese salt $+ {PbO}_{2} +$ conc. ${HNO}_{3} \to$ the solution acquires purple colour. The colour is due to.

1

Mn {({NO}_{3})}_{2}

2

Pb {({NO}_{3})}_{2}

3

{HMnO}_{4}

4

MnO

Explanation:

(C) : The manganese salt is ${MnO}_{2}$
$2 {MnO}_{2} + 4 {HNO}_{3} ⟶ 2 Mn {({NO}_{3})}_{2} + 2 H_{2} O + O_{2}$
$2 Mn {({NO}_{3})}_{2} + 5 {PbO}_{2} + 6 {HNO}_{3} ⟶ 2 {HMnO}_{4} + 5 Pb ({NO}_{3}) + 2 H_{2} O$
Permangaic acid (Niolet pink)

UPTU/UPSEE-2013

COORDINATION COMPOUNDS

274383 Which of the following compound is not coloured?

1

{Na}_{2} CuCl

2

{Na}_{2} Cd \cdot {Cl}_{4}

3

{FeSO}_{4}

4

{VI}_{3}

Explanation:

(B) : ${Na}_{2} [Cd . {Cl}_{4}]$ has no unpaired electron due to presence of $d^{10}$ electrons. ${Cd}^{2 +}$ is a colourless compound.

JIPMER-2017

COORDINATION COMPOUNDS

274421 A violet colour compound is forms in detection of ' $S$ ' in a compound

1

{Na}_{4} [Fe (CN)_{5} NOS]

2

{Na}_{3} [Fe (CN)_{5} NOS]

3

{Na}_{2} [Fe (CN)_{5} NOS]

4

{Na}_{2} [Fe (CN)_{5} NO]

Explanation:

(A) : When ${Na}_{2} S$ is mixed with freshly prepared sodium nitroprusside, a deep violet colour indicates the presence of sulphur.
${Na}_{2} S + {Na}_{2} [Fe (NO) (CN)_{5}] ⟶ {Na}_{4} [(Fe (CN)_{5}) NOS]$
$Sodium nitroprusside Sodium thionitroprusside$

UP CPMT-2006

COORDINATION COMPOUNDS

274422 Which of the following metal ions is not coloured?

1

{Ti}^{3 +}

2

{Fe}^{3 +}

3

V^{2 +}

4

{Zn}^{2 +}

Explanation:

(D) : ${Zn}^{2 +} : (3 d^{10})$ has no unpaired electron. So it is colourless.
${Zn}^{2 +}$ is a divalent metal cation, a zinc cation and a monoatomic dication. It has a role as a human metabolite and cofactor.

UPTU/UPSEE-2006

COORDINATION COMPOUNDS

274423 Copper sulphate solution, When added to an excess of amonium hydroxide, forms a complex compound due to:

1

{[Cu {({NH}_{3})}_{2}]}^{2 +}

2

{[Cu {({NH}_{3})}_{4}]}^{2 +}

3

{[Cu {({NH}_{3})}_{6}]}^{2 +}

4

{Cu}^{2 +}

Explanation:

(B) :
${CuSO}_{4} + {NH}_{4} OH \to Cu [{({NH}_{3})}_{4}] {SO}_{4} + 4 H_{2} O$
${CuSO}_{4} + {NH}_{4} OH \to Cu {[{({NH}_{3})}_{4}]}^{2 +} + 4 H_{2} O$

UPTU/UPSEE-2005

COORDINATION COMPOUNDS

274424 Manganese salt $+ {PbO}_{2} +$ conc. ${HNO}_{3} \to$ the solution acquires purple colour. The colour is due to.

1

Mn {({NO}_{3})}_{2}

2

Pb {({NO}_{3})}_{2}

3

{HMnO}_{4}

4

MnO

Explanation:

(C) : The manganese salt is ${MnO}_{2}$
$2 {MnO}_{2} + 4 {HNO}_{3} ⟶ 2 Mn {({NO}_{3})}_{2} + 2 H_{2} O + O_{2}$
$2 Mn {({NO}_{3})}_{2} + 5 {PbO}_{2} + 6 {HNO}_{3} ⟶ 2 {HMnO}_{4} + 5 Pb ({NO}_{3}) + 2 H_{2} O$
Permangaic acid (Niolet pink)

UPTU/UPSEE-2013

COORDINATION COMPOUNDS

274383 Which of the following compound is not coloured?

1

{Na}_{2} CuCl

2

{Na}_{2} Cd \cdot {Cl}_{4}

3

{FeSO}_{4}

4

{VI}_{3}

Explanation:

(B) : ${Na}_{2} [Cd . {Cl}_{4}]$ has no unpaired electron due to presence of $d^{10}$ electrons. ${Cd}^{2 +}$ is a colourless compound.

JIPMER-2017

COORDINATION COMPOUNDS

274421 A violet colour compound is forms in detection of ' $S$ ' in a compound

1

{Na}_{4} [Fe (CN)_{5} NOS]

2

{Na}_{3} [Fe (CN)_{5} NOS]

3

{Na}_{2} [Fe (CN)_{5} NOS]

4

{Na}_{2} [Fe (CN)_{5} NO]

Explanation:

(A) : When ${Na}_{2} S$ is mixed with freshly prepared sodium nitroprusside, a deep violet colour indicates the presence of sulphur.
${Na}_{2} S + {Na}_{2} [Fe (NO) (CN)_{5}] ⟶ {Na}_{4} [(Fe (CN)_{5}) NOS]$
$Sodium nitroprusside Sodium thionitroprusside$

UP CPMT-2006

COORDINATION COMPOUNDS

274422 Which of the following metal ions is not coloured?

1

{Ti}^{3 +}

2

{Fe}^{3 +}

3

V^{2 +}

4

{Zn}^{2 +}

Explanation:

(D) : ${Zn}^{2 +} : (3 d^{10})$ has no unpaired electron. So it is colourless.
${Zn}^{2 +}$ is a divalent metal cation, a zinc cation and a monoatomic dication. It has a role as a human metabolite and cofactor.

UPTU/UPSEE-2006

COORDINATION COMPOUNDS

274423 Copper sulphate solution, When added to an excess of amonium hydroxide, forms a complex compound due to:

1

{[Cu {({NH}_{3})}_{2}]}^{2 +}

2

{[Cu {({NH}_{3})}_{4}]}^{2 +}

3

{[Cu {({NH}_{3})}_{6}]}^{2 +}

4

{Cu}^{2 +}

Explanation:

(B) :
${CuSO}_{4} + {NH}_{4} OH \to Cu [{({NH}_{3})}_{4}] {SO}_{4} + 4 H_{2} O$
${CuSO}_{4} + {NH}_{4} OH \to Cu {[{({NH}_{3})}_{4}]}^{2 +} + 4 H_{2} O$

UPTU/UPSEE-2005

COORDINATION COMPOUNDS

274424 Manganese salt $+ {PbO}_{2} +$ conc. ${HNO}_{3} \to$ the solution acquires purple colour. The colour is due to.

1

Mn {({NO}_{3})}_{2}

2

Pb {({NO}_{3})}_{2}

3

{HMnO}_{4}

4

MnO

Explanation:

(C) : The manganese salt is ${MnO}_{2}$
$2 {MnO}_{2} + 4 {HNO}_{3} ⟶ 2 Mn {({NO}_{3})}_{2} + 2 H_{2} O + O_{2}$
$2 Mn {({NO}_{3})}_{2} + 5 {PbO}_{2} + 6 {HNO}_{3} ⟶ 2 {HMnO}_{4} + 5 Pb ({NO}_{3}) + 2 H_{2} O$
Permangaic acid (Niolet pink)

UPTU/UPSEE-2013

COORDINATION COMPOUNDS

274383 Which of the following compound is not coloured?

1

{Na}_{2} CuCl

2

{Na}_{2} Cd \cdot {Cl}_{4}

3

{FeSO}_{4}

4

{VI}_{3}

Explanation:

(B) : ${Na}_{2} [Cd . {Cl}_{4}]$ has no unpaired electron due to presence of $d^{10}$ electrons. ${Cd}^{2 +}$ is a colourless compound.

JIPMER-2017