Question 1

How many lone pairs of electrons are there in the Lewis structure of azidocarbonamide,H2NC(O)NNC(O)NH2?

Accepted Answer

A) 8 
B) 12 
C) 10 
D) 16 
E) 6 
A) 8 
B) 12 
C) 10 
D) 16 
E) 6

Question 2

Which of the following has bond angles of 180S1U1P1$\circ$S1S1P0?

Accepted Answer

A) I3-0  
B) ClO2-  
C) O3  
D) NH2-  
E) HO2-  
A) I3-0  
B) ClO2-  
C) O3  
D) NH2-  
E) HO2-

Question 3

Predict the electron arrangement in IF5.

Accepted Answer

Question 4

All of the following are polar except

Accepted Answer

A) SF4.  
B) ClO2-  
C) IF4+. 
D) XeF4 
E) ClF3. 
A) SF4.  
B) ClO2-  
C) IF4+. 
D) XeF4 
E) ClF3.

Question 5

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

Accepted Answer

A) NO2-  
B) I3-  
C) HOCl 
D) O3  
E) CH2-  
A) NO2-  
B) I3-  
C) HOCl 
D) O3  
E) CH2-

Question 6

The molecules OF2 and O3 both have bent shapes.What are the approximate bond angles in OF2 and O3,respectively?

Accepted Answer

A) 109o and 120o 
B) Both 109o 
C) Both 120o 
D) Both 180o 
E) 109o and 180o 
A) 109o and 120o 
B) Both 109o 
C) Both 120o 
D) Both 180o 
E) 109o and 180o

Question 7

All the following have a linear shape except

Accepted Answer

A) BeCl2. 
B) O3. 
C) I3-. 
D) XeF2. 
E) CS2. 
A) BeCl2. 
B) O3. 
C) I3-. 
D) XeF2. 
E) CS2.

Question 8

All the following are polar except

Accepted Answer

A) XeO2.  
B) ClF3.  
C) XeF4.  
D) SOCl2.  
E) XeO3.  
A) XeO2.  
B) ClF3.  
C) XeF4.  
D) SOCl2.  
E) XeO3.

Question 9

Predict the electron arrangement in ClF3.

Accepted Answer

Trigonal b

Question 10

Which of the following is diamagnetic?

Accepted Answer

A) O22- 
B) S2 
C) O2- 
D) O2+  
A) O22- 
B) S2 
C) O2- 
D) O2+

Question 11

Germanium is a semiconductor.Which of the following should be added in small amounts to produce a p-type semiconductor?

Accepted Answer

A) Bi 
B) As 
C) P 
D) Sb 
E) B 
A) Bi 
B) As 
C) P 
D) Sb 
E) B

Question 12

For HF,the LCAO-MO,$\varPsi$  = cH$\varPsi$ H + cF$\varPsi$ F,has cH = cF.

Accepted Answer

A) True 
 B)False

Question 13

The structure of Tylenol is given below:   What hybrid orbitals are used on the N atom and the carbonyl carbon,respectively?

Accepted Answer

A) sp3 and sp2 
B) sp2 and sp2 
C) sp3 and sp3 
D) sp2 and sp 
E) sp3 and sp 
A) sp3 and sp2 
B) sp2 and sp2 
C) sp3 and sp3 
D) sp2 and sp 
E) sp3 and sp

Question 14

What is the shape of AlH4-?

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 15

How many  $\sigma$- and $\pi$-bonds are present in diazomethane,CH2NN?

Accepted Answer

4  @#LAT-DLM&-bonds

Question 16

The fact that B2 has two unpaired electrons means the 2p$\pi$ molecular orbitals have higher energy than the 2p $\sigma$molecular orbitals.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following is polar?

Accepted Answer

A) SF6  
B) ICl4-  
C) SF4  
D) AsF6-  
E) XeF4  
A) SF6  
B) ICl4-  
C) SF4  
D) AsF6-  
E) XeF4

Question 18

Which of the following has the longest bond?

Accepted Answer

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

Question 19

All the following have an angular shape except

Accepted Answer

A) HOCl. 
B) S32-. 
C) I3-. 
D) ClO2-. 
E) NH2-. 
A) HOCl. 
B) S32-. 
C) I3-. 
D) ClO2-. 
E) NH2-.

Question 20

What is the shape of ClF3?

Accepted Answer

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

How many lone pairs of electrons are there in the Lewis structure of azidocarbonamide,H₂NC(O)NNC(O)NH₂?

Which of the following has bond angles of 180^$\circ$?

Predict the electron arrangement in IF₅.

All of the following are polar except

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

The molecules OF₂ and O₃ both have bent shapes.What are the approximate bond angles in OF₂ and O₃,respectively?

All the following have a linear shape except

All the following are polar except

Predict the electron arrangement in ClF₃.

Which of the following is diamagnetic?

Germanium is a semiconductor.Which of the following should be added in small amounts to produce a p-type semiconductor?

For HF,the LCAO-MO, $\varPsi$ = c_H $\varPsi$ _H + c_F $\varPsi$ _F,has c_H = c_F.

The structure of Tylenol is given below: What hybrid orbitals are used on the N atom and the carbonyl carbon,respectively?

What is the shape of AlH₄^-?

How many $\sigma$ - and $\pi$ -bonds are present in diazomethane,CH₂NN?

The fact that B₂ has two unpaired electrons means the 2p_$\pi$ molecular orbitals have higher energy than the 2p_$\sigma$molecular orbitals.

Which of the following is polar?

Which of the following has the longest bond?

All the following have an angular shape except

What is the shape of ClF₃?

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

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The Elements: the Main Group Elements

The Elements: The D Block

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Exam 4: Molecular Shape and Structure

How many lone pairs of electrons are there in the Lewis structure of azidocarbonamide,H2NC(O)NNC(O)NH2?

Which of the following has bond angles of 180 ∘\circ∘ ?

Predict the electron arrangement in IF5.

All of the following are polar except

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

The molecules OF2 and O3 both have bent shapes.What are the approximate bond angles in OF2 and O3,respectively?

All the following have a linear shape except

All the following are polar except

Predict the electron arrangement in ClF3.

Which of the following is diamagnetic?

Germanium is a semiconductor.Which of the following should be added in small amounts to produce a p-type semiconductor?

For HF,the LCAO-MO, Ψ\varPsiΨ = cH Ψ\varPsiΨ H + cF Ψ\varPsiΨ F,has cH = cF.

The structure of Tylenol is given below: What hybrid orbitals are used on the N atom and the carbonyl carbon,respectively?

What is the shape of AlH4-?

How many σ\sigmaσ - and π\piπ -bonds are present in diazomethane,CH2NN?

The fact that B2 has two unpaired electrons means the 2p π\piπ molecular orbitals have higher energy than the 2p σ\sigmaσ molecular orbitals.

Which of the following is polar?

Which of the following has the longest bond?

All the following have an angular shape except

What is the shape of ClF3?

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 lone pairs of electrons are there in the Lewis structure of azidocarbonamide,H₂NC(O)NNC(O)NH₂?

Which of the following has bond angles of 180^$\circ$?

Predict the electron arrangement in IF₅.

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

The molecules OF₂ and O₃ both have bent shapes.What are the approximate bond angles in OF₂ and O₃,respectively?

Predict the electron arrangement in ClF₃.

For HF,the LCAO-MO, $\varPsi$ = c_H $\varPsi$ _H + c_F $\varPsi$ _F,has c_H = c_F.

What is the shape of AlH₄^-?

How many $\sigma$ - and $\pi$ -bonds are present in diazomethane,CH₂NN?

The fact that B₂ has two unpaired electrons means the 2p_$\pi$ molecular orbitals have higher energy than the 2p_$\sigma$molecular orbitals.

What is the shape of ClF₃?