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Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine

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New answer posted

3 months ago

Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine Coordination Compounds

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

Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine Coordination Compounds

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

Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine Coordination Compounds

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

Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine Coordination Compounds

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

Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine Coordination Compounds

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

Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine Coordination Compounds

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

Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine Coordination Compounds

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

Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine Coordination Compounds

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.

New answer posted

3 months ago

Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine Coordination Compounds

Identify the correct statements for the behaviour of ethane-1, 2-diamine as a ligand.

A: It is a neutral ligand. 

B: It is a didentate ligand.

C: It is a chelating ligand. 

D: It is a unidentate ligand
0 Follower 4 Views

V
Vishal Baghel

Contributor-Level 10

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Correct options: A, B and C

Option A, B, and C describe that ethane-1, 2-diamine is a neutral ligand due to its lack of charge, a bidentate ligand due to the presence of two donor sites on one nitrogen atom, and a chelating ligand due to its ability to chelate with metal.

New answer posted

3 months ago

Chemistry NCERT Exemplar Solutions Class 12th Chapter Nine Coordination Compounds

Identify the optically active compounds from the following.

A: [Co(en)3]3+  

B: trans - [Co(en)2]+  

C: cis - [Co(en)2Cl2]+ 

D: [Cr(NH3)5Cl] 
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 and C

Optical compounds are highly imposable compounds that lack symmetry components. As a result, Option A and C are mirror reflections of each other.

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