Question 1

All the following elements exist as diatomic gases at room temperature and atmospheric pressure except

Accepted Answer

A)  H. 
B)  Ar. 
C)  N. 
D)  Cl. 
E)  O. 
A)  H. 
B)  Ar. 
C)  N. 
D)  Cl. 
E)  O.

Question 2

How many electrons are in the expanded valence in XeO4?

Accepted Answer

Question 3

Which of the following is a radical?

Accepted Answer

A)  BrO 
B)  CH3+ 
C)  CH3- 
D)  BF4- 
A)  BrO 
B)  CH3+ 
C)  CH3- 
D)  BF4-

Question 4

In the most plausible Lewis structure of XeOF2, there are

Accepted Answer

A)  2 single bonds, 1 double bond, and 1 lone pair of electrons around Xe. 
B)  3 single bonds and 1 lone pair of electrons around Xe. 
C)  2 single bonds, 1 double bond, and 3 lone pairs of electrons around Xe. 
D)  2 single bonds, 1 double bond, and 2 lone pairs of electrons around Xe. 
E)  3 single bonds and 2 lone pairs of electrons around Xe. 
A)  2 single bonds, 1 double bond, and 1 lone pair of electrons around Xe. 
B)  3 single bonds and 1 lone pair of electrons around Xe. 
C)  2 single bonds, 1 double bond, and 3 lone pairs of electrons around Xe. 
D)  2 single bonds, 1 double bond, and 2 lone pairs of electrons around Xe. 
E)  3 single bonds and 2 lone pairs of electrons around Xe.

Question 5

Draw the Lewis structure of the formate ion and indicate whether resonance forms are possible.

Accepted Answer

Two resona

Question 6

Because of the octet rule,the gaseous O2- ion is stable.

Accepted Answer

A) True 
 B)False

Question 7

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 8

Which of the following has the lowest lattice energy?

Accepted Answer

A)  KCl 
B)  LiCl 
C)  KBr 
D)  NaCl 
E)  KI 
A)  KCl 
B)  LiCl 
C)  KBr 
D)  NaCl 
E)  KI

Question 9

All the following have an angular shape except

Accepted Answer

A)  N3-. 
B)  ClO2-. 
C)  S32-. 
D)  HOCl. 
E)  NH2-. 
A)  N3-. 
B)  ClO2-. 
C)  S32-. 
D)  HOCl. 
E)  NH2-.

Question 10

The NCO bond angle in formamide,H2NCHO,is __________.

Accepted Answer

~ 120<sup>

Question 11

Which of the following has bond angles slightly less than 120$\circ$?

Accepted Answer

A)  NO3- 
B)  HO2- 
C)  NO2- 
D)  CS32- 
E)  I3+ 
A)  NO3- 
B)  HO2- 
C)  NO2- 
D)  CS32- 
E)  I3+

Question 12

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 13

What is the electronic configuration of Ag?

Accepted Answer

1s² 2s² 2p⁶ 3

Question 14

What hybrid orbitals are used by the N atoms in urea, H2NCONH2?

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  dsp3 
A)  sp 
B)  sp2 
C)  sp3 
D)  dsp3

Question 15

For the ground-state ion I-1, what type of orbital do the electrons with highest energy reside in?

Accepted Answer

A)  4d 
B)  6s 
C)  5p 
D)  5d 
E)  5s 
A)  4d 
B)  6s 
C)  5p 
D)  5d 
E)  5s

Question 16

Which of the following species are radicals?
A) CO2
B) HNO3
C) NO2
D) NO-
E) HNO3

Accepted Answer

Question 17

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

Question 18

Predict the HNH bond angle in NH2-.

Accepted Answer

Question 19

How many lone pairs of electrons are found in the Lewis structure of urea, (NH2)2CO?

Accepted Answer

A)  2 
B)  3 
C)  6 
D)  4 
E)  8 
A)  2 
B)  3 
C)  6 
D)  4 
E)  8

Question 20

If 491kJ.mol-1 is released in the reaction Na+(g)+Cl-(g)$\rarr$Na+Cl-(g), what is the energy change for the reaction Na(g)+ Cl(g)$\rarr$Na+Cl-(g)? (Hint: See the discussion in the text and apply Hess's Law.)

Accepted Answer

All the following elements exist as diatomic gases at room temperature and atmospheric pressure except

How many electrons are in the expanded valence in XeO₄?

Which of the following is a radical?

In the most plausible Lewis structure of XeOF₂, there are

Draw the Lewis structure of the formate ion and indicate whether resonance forms are possible.

Because of the octet rule,the gaseous O^2- ion is stable.

All the following are polar except

Which of the following has the lowest lattice energy?

All the following have an angular shape except

The NCO bond angle in formamide,H₂NCHO,is __________.

Which of the following has bond angles slightly less than 120^$\circ$?

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

What is the electronic configuration of Ag?

What hybrid orbitals are used by the N atoms in urea, H₂NCONH₂?

For the ground-state ion I^-1, what type of orbital do the electrons with highest energy reside in?

Which of the following species are radicals? A) CO₂ B) HNO₃ C) NO₂ D) NO^- E) HNO₃

What is the shape of ClF₃?

Predict the HNH bond angle in NH₂^-.

How many lone pairs of electrons are found in the Lewis structure of urea, (NH₂)₂CO?

If 491kJ.mol^-¹ is released in the reaction Na⁺(g)+Cl^-(g) $\rarr$ Na⁺Cl^-(g), what is the energy change for the reaction Na(g)+ Cl(g) $\rarr$ Na⁺Cl^-(g)? (Hint: See the discussion in the text and apply Hess's Law.)

Atoms

States of Matter

Thermodynamics

Equilibrium

Reactions

Kinetics

The Main-Group Elements

The D-Block Elements

Nuclear Chemistry

Organic Chemistry

Filters

Exam 2: Molecules

All the following elements exist as diatomic gases at room temperature and atmospheric pressure except

How many electrons are in the expanded valence in XeO4?

Which of the following is a radical?

In the most plausible Lewis structure of XeOF2, there are

Draw the Lewis structure of the formate ion and indicate whether resonance forms are possible.

Because of the octet rule,the gaseous O2- ion is stable.

All the following are polar except

Which of the following has the lowest lattice energy?

All the following have an angular shape except

The NCO bond angle in formamide,H2NCHO,is __________.

Which of the following has bond angles slightly less than 120 ∘\circ∘ ?

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

What is the electronic configuration of Ag?

What hybrid orbitals are used by the N atoms in urea, H2NCONH2?

For the ground-state ion I-1, what type of orbital do the electrons with highest energy reside in?

Which of the following species are radicals? A) CO2 B) HNO3 C) NO2 D) NO- E) HNO3

What is the shape of ClF3?

Predict the HNH bond angle in NH2-.

How many lone pairs of electrons are found in the Lewis structure of urea, (NH2)2CO?

If 491kJ.mol-1 is released in the reaction Na+(g)+Cl-(g) →\rarr→ Na+Cl-(g), what is the energy change for the reaction Na(g)+ Cl(g) →\rarr→ Na+Cl-(g)? (Hint: See the discussion in the text and apply Hess's Law.)

Atoms

States of Matter

Thermodynamics

Equilibrium

Reactions

Kinetics

The Main-Group Elements

The D-Block Elements

Nuclear Chemistry

Organic Chemistry

Filters

How many electrons are in the expanded valence in XeO₄?

In the most plausible Lewis structure of XeOF₂, there are

Because of the octet rule,the gaseous O^2- ion is stable.

The NCO bond angle in formamide,H₂NCHO,is __________.

Which of the following has bond angles slightly less than 120^$\circ$?

What hybrid orbitals are used by the N atoms in urea, H₂NCONH₂?

For the ground-state ion I^-1, what type of orbital do the electrons with highest energy reside in?

Which of the following species are radicals? A) CO₂ B) HNO₃ C) NO₂ D) NO^- E) HNO₃

What is the shape of ClF₃?

Predict the HNH bond angle in NH₂^-.

How many lone pairs of electrons are found in the Lewis structure of urea, (NH₂)₂CO?

If 491kJ.mol^-¹ is released in the reaction Na⁺(g)+Cl^-(g) $\rarr$ Na⁺Cl^-(g), what is the energy change for the reaction Na(g)+ Cl(g) $\rarr$ Na⁺Cl^-(g)? (Hint: See the discussion in the text and apply Hess's Law.)