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New answer posted

9 months ago

Class 12th Coordination Compounds

What kind of isomerism exists between [Cr(H2O)6]Cl3 (violet) and [Cr(H2O)5Cl]Cl2⋅H2O (greyish-green)?

A: Linkage isomerism

B: Solvate isomerism

C: Ionisation isomerism 

D: Coordination isomerism
0 Follower 4 Views

V
Vishal Baghel

Contributor-Level 10

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct option: B

Hydrate isomerism is isomerism in which water is used as a solvent.

Coordination compounds with the same composition but varying ligand connectivity are known as linkage isomers.

Solvate isomerism has the same composition as free solvent but distinct solvent ligand molecules.

Except for the ligand that swaps places with the anion, ionisation isomers are identical isomers.

Coordination isomers are coordination compounds with distinct metal and ligand compositions.

New answer posted

9 months ago

Class 12th Coordination Compounds

Which of the following species is not expected to be a ligand?

A: NO

B: NH4+ 

C: NH2CH2CH2NH2

D: CO
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Vishal Baghel

Contributor-Level 10

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct option: B

Ligands are neutral ions that form a coordination complex with the central metal atom.

NH4+  does not have a lone pair of electrons to give.

New answer posted

9 months ago

Class 12th Coordination Compounds

A chelating agent has two or more than two donor atoms to bind to a single metal ion. Which of the following is not a chelating agent?

A: Thiosulphato 

B: Oxalato 

C Glycinato

D: Ethane-1,2-diamine
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V
Vishal Baghel

Contributor-Level 10

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct option: A

A chelating agent binds to a single metal ion with two or more donor atoms. Oxaloto, Glycinato, and ethane-1,2-diamine all have two donor oxygen atoms. The gland Thiosulpato is ambidentate.

New answer posted

9 months ago

Class 12th Coordination Compounds

The compounds [Co(SO4)(NH3)5] Brand [Co(SO4)(NH3)5]Cl represent

A: Linkage isomerism 

B: Ionisation isomerism 

C: Coordination isomerism

D: No isomerism
0 Follower 4 Views

V
Vishal Baghel

Contributor-Level 10

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct option: D

Two or more compounds with the same formula but distinct structures and characteristics are known as isomers.

So, in this case compounds 

[Co (SO4) (NH3)5]Br and  [Co (SO4) (NH3)5]Cl show no isomerism

New answer posted

9 months ago

Class 12th Coordination Compounds

Due to the presence of ambidentate ligands coordination compounds show isomerism. Palladium complexes of the type [Pd(C6H5)2(SCN)2] and [Pd(C6H5)2(NCS)2] are

(A) Linkage isomers

(B) Coordination isomers

(C) Ionization isomers

(D) Geometrical isomers
0 Follower 3 Views

V
Vishal Baghel

Contributor-Level 10

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct option: (A)

Linkage isomerism arises in a coordination compound containing ambidentate ligand.

A simple example is by complexes containing the thiocyanate ligand, NCS-which may bind through the nitrogen to give M-NCS or through sulphur to give M-SCN.

New answer posted

9 months ago

Class 12th Coordination Compounds

The CFSE for octahedral [CoCl6]4- is 18,000 cm−1. The CFSE for tetrahedral [CoCl4]2- will be

A: 18,000 cm−1

B: 16,000 cm−1

C: 8,000 cm−1

D: 20,000 cm−1
0 Follower 5 Views

V
Vishal Baghel

Contributor-Level 10

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct option: A

CFSE for octahedral and tetrahedral complex is related as

Δt = 4 9 Δ0

Where Δ0= CFSE for octahedral complex

Δ0= CFSE for tetrahedral complex

Δ0=1800 cm−1

Δt =49*18000=8000 cm−1

New answer posted

9 months ago

Class 12th Coordination Compounds

Indicate the complex ion which shows geometrical isomerism.

A: [Cr(H2O)4Cl2]+ 

B: [Pt(NH3)3Cl]

C: [Co(NH3)6]3+ 

D: [Co(CN)5](NC)3- 
0 Follower 7 Views

V
Vishal Baghel

Contributor-Level 10

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct option: A

This is due to the complex's octahedral structure and (cis-trans) isomerism. Two Cl ligands are next to each other in trans isomerism. Although these isomers have the same structure, they are not identical.

Possible isomers are:

New answer posted

9 months ago

Class 12th Coordination Compounds
The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species? 

A: [Fe(CO)5]

B: [Fe(CN)6]3- 

C: [Fe(C2O4)3]3- 

D: [Fe(H2O)6]3+ 
0 Follower 4 Views

V
Vishal Baghel

Contributor-Level 10

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct option: C

The chelate effect is when a chelating ligand coordinates the stabilisation of a molecule. Any ligand that binds to metal forms a ring with 5 or 6 members, which is the most stable.

Here, CO, CN, H2O is monodentate ligand [Fe (C2O4)3]3-  is an oxalate ligand. 

New answer posted

9 months ago

Class 12th Coordination Compounds

The correct IUPAC name of [Pt(NH3)2Cl2] is

(i) Diamminedichloridoplatinum (II)

(ii) Diamminedichloridoplatinum (IV)

(iii) Diamminedichloridoplatinum (0)

(iv) Dichloridodiammineplatinum (IV)
0 Follower 3 Views

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Vishal Baghel

Contributor-Level 10

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct option:  A

Diamminedichloridoplatinum (II) is also known as azane 

New answer posted

9 months ago

Class 12th Coordination Compounds

When 1 mol [CrCl3(H2O)3]6H2O is treated with excess of AgNO3, 3 mol of AgCl are obtained. The formula of the complex is: 

A: [CrCl3(H2O)3 ].3H2O

B: [CrCl2(H2O)4]Cl.2H2O

C: [CrCl2(H2O)5]Cl2H2O

D: [Cr(H2O)6]Cl3
0 Follower 6 Views

V
Vishal Baghel

Contributor-Level 10

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct option: D

When 1 mol [CrCl3 (H2O)3]6H2O is treated with excess of AgNO3, 3 mol of AgCl is produced, i.e., [CrCl3 (H2O)3]6H2Ois dissociated in aqueous solution and all three chloride comes in solution.

[Cr (H2O)6]Cl3→ [Cr (H2O)6]3+  + 3Cl- 

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