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Coordination Compounds

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3 months ago

Coordination Compounds Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine

Assertion: Complexes of MX6 and MX5L type (X and L are unidentate) do not show geometrical   isomerism.

Reason: Geometrical isomerism is not shown by complexes of coordination number 6.
0 Follower 2 Views

V
Vishal Baghel

Contributor-Level 10

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Ans: Correct option: B

From the Cis and Trans forms, geometrical isomerism forms compounds. All of the valences in the MX6 ligand are the same, resulting in an identical molecule. L is a distinct ligand in MX5L, and it can be replaced with any other valency in the structure to create an identical molecule; the molecule does not change. Because of the presence of symmetry, which is an essential prerequisite for revealing geometrical isomerism, complexes do not show geometrical isomerism.

New answer posted

3 months ago

Coordination Compounds Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine

Assertion: Linkage isomerism arises in coordination compounds containing ambidentate ligand.                      

Reason: Ambidentate ligand has two different donor atoms.
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V
Vishal Baghel

Contributor-Level 10

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Ans: Correct option: A

The term "linkage isomerism" refers to two molecules that have similar ligands but differ in the donating site of the ligand. Ambidentate is made up of two different types of donor atoms.

Example [Fe (NO2) (H2O)5]Cl2. NO2 is Ambidentate ligand as Nand O2 are donors.

 As a result, linkage isomerism occurs in coordinations with ambidentate ligands. Reason and Assertion are both correct.

New answer posted

3 months ago

Coordination Compounds Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine

Assertion : [Cr(H2O)6]Cl2 and [Fe(H2O)6]Cl2 are reducing in nature. 

 Reason: Unpaired electrons are present in their d-orbitals.
0 Follower 4 Views

V
Vishal Baghel

Contributor-Level 10

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Ans: Correct option: B

[Cr (H2O)6]Cl2 and [Fe (H2O)6]Cl2 

Due to the creation of a more stable complex ion after obtaining ion, [Cr (H2O)6]Cl2 and [Fe (H2O)6]Cl2 are reduced in nature. Both compounds have a coordination of 6 and so form an octahedral complex. The hybridisation state of is 3 and the oxidation state of is 2+. Hybridization is 3d4 and 3d6 is 2+. Both compounds have unpaired electrons and have weak field ligands. In both compounds, removing electrons is simple.

New answer posted

3 months ago

Coordination Compounds Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine

In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

A: Assertion and reason both are true, reason is correct  of assertion. 

B: Assertion and reason both are true, but reason is not the correct  of assertion.

C: Assertion is true, reason is false.

D: Assertion is false, reason is true

1. Assertion: Toxic metal ions are removed by the chelating ligands. 

    Reason: Chelate complexes tend to be more stable.
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V
Vishal Baghel

Contributor-Level 10

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Ans: Correct option: A

Toxic metal ions are removed by the chelating ligands. Chelate complexes tend to be more stable. When a solution of the chelating ligand is added to a solution containing toxic metals ligands chelates the metal ions by the formation of a stable complex.

Thus, EDT A (hexadentate ligand) forms a stable metal chelate and is used to remove toxic metal ions.

Both Assertion and Reason are correct and Reason is the correct  for Assertion.

Hence, option A is correct.

New answer posted

3 months ago

Coordination Compounds Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine

Match the compounds given in Column I with the oxidation state of cobalt present in it (given in Column II) and assign the correct code.

Column I (Compound)

Column II (Oxidation state of Co)

A. [Co(NCS)(NH3)5(SO3)]

1. + 4

B. [Co(NH3)4Cl2]SO4

2. 0

C. Na4[Co(S2O3)3]

3. +1

D. [Co2(CO)8]

4. +2
 

5. +3

Code 

(i) A (1)     B (2)      C (4)      D (5)

(ii) A (4)    B (3)      C (2)      D (1) 

(iii) A (5)   B (1)      C (4)      D (2) 

(iv) A (4)   B (1)      C (2)      D (3)
0 Follower 1 View

V
Vishal Baghel

Contributor-Level 10

This is a Matching Type Questions as classified in NCERT Exemplar

Ans: Correct option: (i)

New answer posted

3 months ago

Coordination Compounds Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine

Match the complex species given in Column I with the possible isomerism given in Column II and assign the correct code

Column I (Complex species)

Column II (Isomerism)

A. [Co(NH3)4Cl2]+ 

1. Optical

B. cis - [Co(en)2Cl2]+ 

2. Ionisation

C. [Co(NH3)5(NO2)]Cl2

3. Coordination

D. [Co(NH3)6][Cr(CN)6]

4. geometrical
 

5. linkage

Code :

(i)  A (1)     B (2)     C (4)     D (5) 

(ii) A (4)      B (3)     C (2)     D (1) 

(iii) A (4)     B (1)     C (5)     D (3) 

(iv) A (4)     B (1)     C (2)     D (3)
0 Follower 1 View

V
Vishal Baghel

Contributor-Level 10

This is a Matching Type Questions as classified in NCERT Exemplar

Ans: Correct option: (iv)

New answer posted

3 months ago

Coordination Compounds Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine

Match the complex ions given in Column I with the hybridisation and number of unpaired electrons given in Column II and assign the correct code

Column I (Complex ion)

Column II (Hybrisization, number of unpaired electrons)

A. [Cr(H2O)6]3+ 

1. dsp2, 1

B. [Co(CN)4]2- 

2. sp3d2, 5

C. [Ni(NH3)6]2+ 

3. d2sp3, 3

D. [MnF6]4- 

4. sp3, 4
 

5. sp3d2, 2

Code

 (i) A (3)     B (1)      C (5)      D (2)

(ii) A (4)     B (3)      C (2)      D (1)

(iii) A (3)    B (2)      C (4)      D (1) 

(iv) A (4)     B (1)     C (2)     D (3)
0 Follower 2 Views

V
Vishal Baghel

Contributor-Level 10

This is a Matching Type Questions as classified in NCERT Exemplar

Ans: Correct option: (ii)

New answer posted

3 months ago

Coordination Compounds Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine

Match the coordination compounds given in Column I with the central metal atoms given in Column II and assign the correct code

Column I (Coordination Compound)

Column II (Central metal atom)

A. Chlorophyll

1. Rhodium

B. Blood pigment

2. Cobalt

C. Wilkinson catalyst

3. calcium

D. Vitamin B12

4. iron
 

5. magnesium

Code

(i)   A (5)     B (4)     C (1)     D (2)

(ii)  A (3)     B (4)     C (5)     D (1)

(iii) A (4)     B (3)     C (2)     D (1)

(iv) A (3)     B (4)     C (1)     D (2)
0 Follower 1 View

V
Vishal Baghel

Contributor-Level 10

This is a Matching Type Questions as classified in NCERT Exemplar

Ans: Correct option: (i)

New answer posted

3 months ago

Coordination Compounds Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine

Match the complex ions given in Column I with the colours given in Column II and assign the correct code

Column I (Complex ion)

Column II (Colour)

A. [Co(NH3)6]3+ 

1. Violet

B. [Ti(H2O)6]3+ 

2. Green

C. [Ni(H2O)6]2+ 

3. Pale blue

D. [Ni(H2O)4(en]2+ (aq)

4. Yellowish orange
 

5. Blue

 

Code

(i) A (1)           B (2)          C (4)           D (5)

(ii) A (4)          B (3)          C (2)           D (1)

(iii) A (3)         B (2)          C (4)           D (1)

(iv) A (4)         B (1)          C (2)           D (3)
0 Follower 1 View

V
Vishal Baghel

Contributor-Level 10

This is a Matching Type Questions as classified in NCERT Exemplar

Ans: Correct option: (ii)

New answer posted

3 months ago

Coordination Compounds Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine

Which of the following complexes show linkage isomerism?

A: [Co(NH3)5(NO2)]2+ 

B: [Co(H2O)5]3+ 

C: [Cr(NH3)5SCN]2+ 

D: [Fe(en)5Cl2]+
0 Follower 2 Views

V
Vishal Baghel

Contributor-Level 10

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct option: C

Coordination compounds with the same composition but varying ligand-metal connectivity are known as linkage isomerism.

[Co (NH3)5 (NO2)]2+ , NO2 has two donor sites N and O

[Cr (NH3)5SCN]2+ , S and N are two donor sites.

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