Question 1

Which of the following is paramagnetic?

Accepted Answer

A) N2  
B) B2  
C) O22- 
D) C22- 
E) B22- 
A) N2  
B) B2  
C) O22- 
D) C22- 
E) B22- B

Question 2

How many  $\sigma$- and $\pi$-bonds,respectively,are there in the Lewis structure of azidocarbonamide,H2NC(O)NNC(O)NH2?

Accepted Answer

A) 14 and 3 
B) 15 and 3 
C) 14 and 2 
D) 8 and 3 
E) 11 and 3 
A) 14 and 3 
B) 15 and 3 
C) 14 and 2 
D) 8 and 3 
E) 11 and 3 E

Question 3

Which of the following only has bond angles of 90S1U1P1$\circ$S1S1P0?

Accepted Answer

A) IF5  
B) IF4+ 
C) XeF2  
D) SF4  
E) IO2F3  
A) IF5  
B) IF4+ 
C) XeF2  
D) SF4  
E) IO2F3  A

Question 4

Name all the angles in a trigonal bipyramidal geometry.

Accepted Answer

The answer of Name all the angles in a trigonal...

Question 5

Which of the following is paramagnetic?

Accepted Answer

A) N2  
B) N22+ 
C) O22- 
D) N22- 
E) NO+  
A) N2  
B) N22+ 
C) O22- 
D) N22- 
E) NO+

Question 6

The bond order of O22+ is

Accepted Answer

A) 1. 
B) 2. 
C) 3. 
D) 2.5. 
E) 1.5. 
A) 1. 
B) 2. 
C) 3. 
D) 2.5. 
E) 1.5.

Question 7

Both C2 and C22− are diamagnetic.True or false?

Accepted Answer

A) True 
 B)False

Question 8

What is the shape of SO32-?

Accepted Answer

A) T-shaped 
B) Trigonal pyramidal 
C) Seesaw 
D) Tetrahedral 
E) Trigonal planar 
A) T-shaped 
B) Trigonal pyramidal 
C) Seesaw 
D) Tetrahedral 
E) Trigonal planar

Question 9

What is the shape of BrO4-?

Accepted Answer

A) Tetrahedral 
B) Trigonal bipyramidal 
C) Seesaw 
D) T-shaped 
E) Square planar 
A) Tetrahedral 
B) Trigonal bipyramidal 
C) Seesaw 
D) T-shaped 
E) Square planar

Question 10

What is the shape of XeF4?

Accepted Answer

A) Square planar 
B) Tetrahedral 
C) Trigonal bipyramidal 
D) Seesaw 
E) T-shaped 
A) Square planar 
B) Tetrahedral 
C) Trigonal bipyramidal 
D) Seesaw 
E) T-shaped

Question 11

Which of the following is an n-type semiconductor?

Accepted Answer

A) Silicon doped with phosphorus 
B) Silicon doped with boron 
C) GaAs with gallium in excess of arsenic 
D) Selenium doped with indium 
E) Germanium doped with indium 
A) Silicon doped with phosphorus 
B) Silicon doped with boron 
C) GaAs with gallium in excess of arsenic 
D) Selenium doped with indium 
E) Germanium doped with indium

Question 12

Which of the following has bond angles slightly less than 109S1U1P1$\circ$S1S1P0?

Accepted Answer

A) CS32-  
B) AsF3  
C) SO2  
D) COCl2  
E) COS 
A) CS32-  
B) AsF3  
C) SO2  
D) COCl2  
E) COS

Question 13

Which of the following has bond angles slightly less than 109S1U1P1$\circ$S1S1P0?

Accepted Answer

A) NH4+ 
B) ClO4-  
C) BrO3-  
D) PO43-  
E) BH4-  
A) NH4+ 
B) ClO4-  
C) BrO3-  
D) PO43-  
E) BH4-

Question 14

Dinitrogen monoxide has a dipole moment.Draw the arrangement of atoms and indicate the shape of dinitrogen monoxide.

Accepted Answer

The answer of Dinitrogen monoxide has a dipole moment.Draw the...

Question 15

Which of the following species has two unpaired electrons?

Accepted Answer

A) OF+  
B) NO+  
C) CO+  
D) NF+  
E) CF+  
A) OF+  
B) NO+  
C) CO+  
D) NF+  
E) CF+

Question 16

The structure of Tylenol is given below:   Estimate the C-N-H bond angle.

Accepted Answer

A) ~ 109o 
B) ~ 120o 
C) > 109o 
D) > 120o 
E) ~ 90o 
A) ~ 109o 
B) ~ 120o 
C) > 109o 
D) > 120o 
E) ~ 90o

Question 17

Predict the electron arrangement in NO2-.

Accepted Answer

The answer of Predict the electron arrangement in NO2-....

Question 18

How many  $\sigma$- and $\pi$-bonds,respectively,are there in acrolein,CH2=CHCHO?

Accepted Answer

A) 4 and 2 
B) 7 and 2 
C) 5 and 2 
D) 5 and 4 
E) 7 and 1 
A) 4 and 2 
B) 7 and 2 
C) 5 and 2 
D) 5 and 4 
E) 7 and 1

Question 19

What is the shape of CS32-?

Accepted Answer

A) Trigonal pyramidal 
B) Trigonal planar 
C) T-shaped 
D) Tetrahedral 
E) Seesaw 
A) Trigonal pyramidal 
B) Trigonal planar 
C) T-shaped 
D) Tetrahedral 
E) Seesaw

Question 20

The bond order of N22+ is

Accepted Answer

A) 2.5. 
B) 1. 
C) 2. 
D) 1.5. 
E) 3. 
A) 2.5. 
B) 1. 
C) 2. 
D) 1.5. 
E) 3.

Which of the following is paramagnetic?

How many $\sigma$ - and $\pi$ -bonds,respectively,are there in the Lewis structure of azidocarbonamide,H₂NC(O)NNC(O)NH₂?

Which of the following only has bond angles of 90^$\circ$?

Name all the angles in a trigonal bipyramidal geometry.

Which of the following is paramagnetic?

The bond order of O₂²⁺ is

Both C₂ and C₂²⁻ are diamagnetic.True or false?

What is the shape of SO₃²^-?

What is the shape of BrO₄^-?

What is the shape of XeF₄?

Which of the following is an n-type semiconductor?

Which of the following has bond angles slightly less than 109^$\circ$?

Which of the following has bond angles slightly less than 109^$\circ$?

Dinitrogen monoxide has a dipole moment.Draw the arrangement of atoms and indicate the shape of dinitrogen monoxide.

Which of the following species has two unpaired electrons?

The structure of Tylenol is given below: Estimate the C-N-H bond angle.

Predict the electron arrangement in NO₂^-.

How many $\sigma$ - and $\pi$ -bonds,respectively,are there in acrolein,CH₂=CHCHO?

What is the shape of CS₃²^-?

The bond order of N₂²⁺ is

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

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Thermodynamics: The First Law

Thermodynamics: The Second and Third Laws

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The Elements: The D Block

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Exam 4: Molecular Shape and Structure

Which of the following is paramagnetic?

How many σ\sigmaσ - and π\piπ -bonds,respectively,are there in the Lewis structure of azidocarbonamide,H2NC(O)NNC(O)NH2?

Which of the following only has bond angles of 90 ∘\circ∘ ?

Name all the angles in a trigonal bipyramidal geometry.

Which of the following is paramagnetic?

The bond order of O22+ is

Both C2 and C22− are diamagnetic.True or false?

What is the shape of SO32-?

What is the shape of BrO4-?

What is the shape of XeF4?

Which of the following is an n-type semiconductor?

Which of the following has bond angles slightly less than 109 ∘\circ∘ ?

Which of the following has bond angles slightly less than 109 ∘\circ∘ ?

Dinitrogen monoxide has a dipole moment.Draw the arrangement of atoms and indicate the shape of dinitrogen monoxide.

Which of the following species has two unpaired electrons?

The structure of Tylenol is given below: Estimate the C-N-H bond angle.

Predict the electron arrangement in NO2-.

How many σ\sigmaσ - and π\piπ -bonds,respectively,are there in acrolein,CH2=CHCHO?

What is the shape of CS32-?

The bond order of N22+ is

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

The Properties of Gases

Liquids and Solids

Inorganic Materials

Thermodynamics: The First Law

Thermodynamics: The Second and Third Laws

Physical Equilibria

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

The Elements: the Main Group Elements

The Elements: The D Block

Nuclear Chemistry

Organic Chemistry I

Organic Chemistry II

Filters

How many $\sigma$ - and $\pi$ -bonds,respectively,are there in the Lewis structure of azidocarbonamide,H₂NC(O)NNC(O)NH₂?

Which of the following only has bond angles of 90^$\circ$?

The bond order of O₂²⁺ is

Both C₂ and C₂²⁻ are diamagnetic.True or false?

What is the shape of SO₃²^-?

What is the shape of BrO₄^-?

What is the shape of XeF₄?

Which of the following has bond angles slightly less than 109^$\circ$?

Which of the following has bond angles slightly less than 109^$\circ$?

Predict the electron arrangement in NO₂^-.

How many $\sigma$ - and $\pi$ -bonds,respectively,are there in acrolein,CH₂=CHCHO?

What is the shape of CS₃²^-?

The bond order of N₂²⁺ is