Question 1

Name the complex ion [Cr(en)2(H2O)2]2+.

Accepted Answer

diaquobis(

Question 2

The correct name for Fe(CO)5 is:

Accepted Answer

A) pentacarbonyliron(V) 
B) pentacarbonyliron(0) 
C) hexacarbonyliron(0) 
D) hexacarbonyliron(V) 
E) pentacarbonateiron(0) 
A) pentacarbonyliron(V) 
B) pentacarbonyliron(0) 
C) hexacarbonyliron(0) 
D) hexacarbonyliron(V) 
E) pentacarbonateiron(0)

Question 3

The total number of electrons in the 3d orbitals of Ti3+ is

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 4

Which of the following choices can function as a monodentate ligand only?

Accepted Answer

A) (H2NCH2CH2NH2) 
B) (-O2CCO2- 
C) (H2O) 
D) (-OCH2CH2CH2O-) 
E) (H2PCH2CH2PH2) 
A) (H2NCH2CH2NH2) 
B) (-O2CCO2- 
C) (H2O) 
D) (-OCH2CH2CH2O-) 
E) (H2PCH2CH2PH2)

Question 5

How many geometric isomers are possible for the complex [CrF3Br3]3-? Draw these isomers.

Accepted Answer

Two geometric isomer

Question 6

What is the coordination number of chromium in Cr(en)2Cl2?

Accepted Answer

Question 7

How many unpaired electrons does the manganese ion have in [Mn(CN)6]4-?

Accepted Answer

A) 1 unpaired electron 
B) 2 unpaired electrons 
C) 3 unpaired electrons 
D) 5 unpaired electrons 
E) No unpaired electrons 
A) 1 unpaired electron 
B) 2 unpaired electrons 
C) 3 unpaired electrons 
D) 5 unpaired electrons 
E) No unpaired electrons

Question 8

In the complex ion [Co(en)2Br2]+, the oxidation number of Co is

Accepted Answer

A) +1. 
B) +2. 
C) +3. 
D) -2. 
E) -1. 
A) +1. 
B) +2. 
C) +3. 
D) -2. 
E) -1.

Question 9

Predict the number of unpaired electrons in the [Cr(en)3]2+ ion.

Accepted Answer

Question 10

The oxidation number of Co in [Co(NH3)4Cl2]Cl is +1.

Accepted Answer

A) True 
 B)False

Question 11

Assuming a coordination complex is formed with Fe2+ and 1,10-phenanthroline (shown below), which of the following statements is true?

Accepted Answer

A) If two 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 2. 
B) If two 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 6. 
C) If three 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 3. 
D) If three 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 6. 
E) If four 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 4. 
A) If two 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 2. 
B) If two 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 6. 
C) If three 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 3. 
D) If three 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 6. 
E) If four 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 4.

Question 12

Which of these ligands produces the strongest crystal field?

Accepted Answer

A) Cl- 
B) CO 
C) OH- 
D) H2O 
E) NH3 
A) Cl- 
B) CO 
C) OH- 
D) H2O 
E) NH3

Question 13

What is the oxidation number of Co in the complex Co(H2O)3Cl3?

Accepted Answer

Question 14

Name the complex ion [CuCl3Br(NH3)2]2-.

Accepted Answer

diamminebr

Question 15

The total number of electrons in the 3d orbitals of Cr3+ is

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 16

In the complex ion [ML6]n+, Mn+ has six d electrons and L is a weak field ligand.According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 17

Write the chemical formula of diamminedichloroplatinum(II).

Accepted Answer

The answer of Write the chemical formula of diamminedichloroplatinum(II)....

Question 18

Which of the following complexes has optical (chiral)isomers?

Accepted Answer

A) [Co(NH3)4Br2]+ 
B) [Co(en)3]3+ 
C) Co(NH3)3Br3 
D) [Co(en)Br4] - 
E) [Co(en)(NH3)4] 3+ 
A) [Co(NH3)4Br2]+ 
B) [Co(en)3]3+ 
C) Co(NH3)3Br3 
D) [Co(en)Br4] - 
E) [Co(en)(NH3)4] 3+

Question 19

Bidentate and polydentate ligands are also called chelating agents.

Accepted Answer

A) True 
 B)False

Question 20

Two well-known complex ions containing Ni are [Ni(H2O)6]2+, which is green, and [Ni(en)3]2+, which is purple.Which one of these statements is true?

Accepted Answer

A) The crystal field splitting energy ($\Delta$)is greater for [Ni(en)3]2+ than for [Ni(H2O)6]2+. 
B) [Ni(en)3]2+ absorbs energy in the red region of the spectrum. 
C) Both complex ions are diamagnetic. 
D) [Ni(H2O)6]2+ transmits light with wavelengths of approximately 650-700 nm. 
E) The green complex absorbs green light. 
A) The crystal field splitting energy ($\Delta$)is greater for [Ni(en)3]2+ than for [Ni(H2O)6]2+. 
B) [Ni(en)3]2+ absorbs energy in the red region of the spectrum. 
C) Both complex ions are diamagnetic. 
D) [Ni(H2O)6]2+ transmits light with wavelengths of approximately 650-700 nm. 
E) The green complex absorbs green light.

Exam 23: Transition Metal Chemistry and Coordination Compounds

Name the complex ion [Cr(en)2(H2O)2]2+.

The correct name for Fe(CO)5 is:

The total number of electrons in the 3d orbitals of Ti3+ is

Which of the following choices can function as a monodentate ligand only?

How many geometric isomers are possible for the complex [CrF3Br3]3-? Draw these isomers.

What is the coordination number of chromium in Cr(en)2Cl2?

How many unpaired electrons does the manganese ion have in [Mn(CN)6]4-?

In the complex ion [Co(en)2Br2]+, the oxidation number of Co is

Predict the number of unpaired electrons in the [Cr(en)3]2+ ion.

The oxidation number of Co in [Co(NH3)4Cl2]Cl is +1.

Assuming a coordination complex is formed with Fe2+ and 1,10-phenanthroline (shown below), which of the following statements is true?

Which of these ligands produces the strongest crystal field?

What is the oxidation number of Co in the complex Co(H2O)3Cl3?

Name the complex ion [CuCl3Br(NH3)2]2-.

The total number of electrons in the 3d orbitals of Cr3+ is

In the complex ion [ML6]n+, Mn+ has six d electrons and L is a weak field ligand.According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

Write the chemical formula of diamminedichloroplatinum(II).

Which of the following complexes has optical (chiral)isomers?

Bidentate and polydentate ligands are also called chelating agents.

Two well-known complex ions containing Ni are [Ni(H2O)6]2+, which is green, and [Ni(en)3]2+, which is purple.Which one of these statements is true?

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Filters

Name the complex ion [Cr(en)₂(H₂O)₂]²⁺.

The correct name for Fe(CO)₅is:

The total number of electrons in the 3d orbitals of Ti³⁺ is

How many geometric isomers are possible for the complex [CrF₃Br₃]^3-? Draw these isomers.

What is the coordination number of chromium in Cr(en)₂Cl₂?

How many unpaired electrons does the manganese ion have in [Mn(CN)₆]^4-?

In the complex ion [Co(en)₂Br₂]⁺, the oxidation number of Co is

Predict the number of unpaired electrons in the [Cr(en)₃]²⁺ ion.

The oxidation number of Co in [Co(NH₃)₄Cl₂]Cl is +1.

Assuming a coordination complex is formed with Fe²⁺ and 1,10-phenanthroline (shown below), which of the following statements is true?

What is the oxidation number of Co in the complex Co(H₂O)₃Cl₃?

Name the complex ion [CuCl₃Br(NH₃)₂]^2-.

The total number of electrons in the 3d orbitals of Cr³⁺ is

In the complex ion [ML₆]ⁿ⁺, Mⁿ⁺ has six d electrons and L is a weak field ligand.According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

Two well-known complex ions containing Ni are [Ni(H₂O)₆]²⁺, which is green, and [Ni(en)₃]²⁺, which is purple.Which one of these statements is true?