Chapt er 5 Exam Practice Problems
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Chapt er 5 Exam Practice Problems • • • •
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Print Chapter 5 Exam Practice Problems Due: 10:45am on Wednesday, December 21, 2011 Note: You will receive no credit for late submissions. To learn more, read your instructor's Grading Policy Chapter 5 Question 5 - Multiple Choice Part A Which is the longest bond? ANSWER: N–N N≡N N=N All three bond lengths should be about the same. Chapter 5 Question 16 - Multiple Choice Part A The compound ICl contains ANSWER: nonpolar covalent bonds. ionic bonds. polar covalent bonds, with partial negative charges on the I atoms. polar covalent bonds, with partial negative charges on the Cl atoms. Chapter 5 Question 27 - Multiple Choice
Part A The compound, NO2, is named ANSWER: nitrite. nitrogen dioxide. nitrate. nitrogen(IV) oxide. Chapter 5 Question 32 - Multiple Choice Part A Which is the most acceptable electron dot structure for ANSWER:
Chapter 5 Question 29 - Multiple Choice Part A The nitrogen-nitrogen bond in :N≡N: has a bond order of ANSWER: 2 6 1 3 Chapter 5 Question 42 - Multiple Choice Part A How many lone pairs are on the Br atom in BrF2-? ANSWER:
?
1 3 2 0 Chapter 5 Question 44 - Multiple Choice Part A How many resonance structures are required in the electron-dot structure of CO32-? ANSWER: four two three five Chapter 5 Question 47 - Multiple Choice Part A Which one of the following is expected to exhibit resonance? ANSWER: CO2 NH4+ NO2HCN Chapter 5 Question 48 - Multiple Choice Part A Based on formal charge considerations, the electron-dot structure of CO32– ion has ANSWER: two resonance structures involving one single bond and two double bonds. two resonance structures involving two single bonds and one double bond. three resonance structures involving two single bonds and one double bond. three resonance structures involving one single bond and two double bonds. Chapter 5 Question 57 - Multiple Choice Part A Based on VSEPR theory, which should have the smallest XAX bond angle? ANSWER:
Chapter 5 Question 60 - Multiple Choice Part A Which of the following should be nonlinear?
ANSWER: only III only II II and III only I Chapter 5 Question 59 - Multiple Choice Part A What is the molecular geometry of BrF4-? ANSWER: square planar tetrahedral
seesaw square pyramidal Chapter 5 Question 75 - Multiple Choice Part A The orbital hybridization on the carbon atom in HCN is ANSWER: sp 3. sp 2. sp. none of the above Chapter 5 Question 83 - Multiple Choice Part A Which molecular orbital resembles a p-orbital? ANSWER: σ* π* σ π Chapter 5 Question 84 - Multiple Choice Part A If an electron is added to H2 it would go into a ANSWER: σ* molecular orbital and strengthen the H–H bond. σ molecular orbital and strengthen the H–H bond. σ molecular orbital and weaken the H–H bond. σ* molecular orbital and weaken the H–H bond. Chapter 5 Question 91 - Multiple Choice Part A The paramagnetism of O2 is explained by ANSWER: molecular orbital theory. resonance. valence bond theory. coordinate covalent bonding. Chapter 5 Question 103 - Multiple Choice Part A
What is the geometry around the central atom in the following molecular model of PH3?
ANSWER: linear bent trigonal pyramidal tetrahedral Chapter 5 Question 114 - Multiple Choice Part A What is the geometry around the central atom in the following molecular model of PF6-?
ANSWER: trigonal bipyramidal octahedral square pyramidal square planar Chapter 5 Question 178 - Multiple Choice Part A Which drawing represents the lowest energy unoccupied molecular orbital in the N2 molecule in its ground state? ANSWER:
Chapt er 5 Exam Practice Problems • • • •
Overview Summary View Diagnostics View Print View with Answers
Print Chapter 5 Exam Practice Problems Due: 10:45am on Wednesday, December 21, 2011 Note: You will receive no credit for late submissions. To learn more, read your instructor's Grading Policy Chapter 5 Question 5 - Multiple Choice Part A Which is the longest bond? ANSWER: N–N N≡N N=N All three bond lengths should be about the same. Chapter 5 Question 16 - Multiple Choice Part A The compound ICl contains ANSWER: nonpolar covalent bonds. ionic bonds. polar covalent bonds, with partial negative charges on the I atoms. polar covalent bonds, with partial negative charges on the Cl atoms. Chapter 5 Question 27 - Multiple Choice
Part A The compound, NO2, is named ANSWER: nitrite. nitrogen dioxide. nitrate. nitrogen(IV) oxide. Chapter 5 Question 32 - Multiple Choice Part A Which is the most acceptable electron dot structure for ANSWER:
Chapter 5 Question 29 - Multiple Choice Part A The nitrogen-nitrogen bond in :N≡N: has a bond order of ANSWER: 2 6 1 3 Chapter 5 Question 42 - Multiple Choice Part A How many lone pairs are on the Br atom in BrF2-? ANSWER:
?
1 3 2 0 Chapter 5 Question 44 - Multiple Choice Part A How many resonance structures are required in the electron-dot structure of CO32-? ANSWER: four two three five Chapter 5 Question 47 - Multiple Choice Part A Which one of the following is expected to exhibit resonance? ANSWER: CO2 NH4+ NO2HCN Chapter 5 Question 48 - Multiple Choice Part A Based on formal charge considerations, the electron-dot structure of CO32– ion has ANSWER: two resonance structures involving one single bond and two double bonds. two resonance structures involving two single bonds and one double bond. three resonance structures involving two single bonds and one double bond. three resonance structures involving one single bond and two double bonds. Chapter 5 Question 57 - Multiple Choice Part A Based on VSEPR theory, which should have the smallest XAX bond angle? ANSWER:
Chapter 5 Question 60 - Multiple Choice Part A Which of the following should be nonlinear?
ANSWER: only III only II II and III only I Chapter 5 Question 59 - Multiple Choice Part A What is the molecular geometry of BrF4-? ANSWER: square planar tetrahedral
seesaw square pyramidal Chapter 5 Question 75 - Multiple Choice Part A The orbital hybridization on the carbon atom in HCN is ANSWER: sp 3. sp 2. sp. none of the above Chapter 5 Question 83 - Multiple Choice Part A Which molecular orbital resembles a p-orbital? ANSWER: σ* π* σ π Chapter 5 Question 84 - Multiple Choice Part A If an electron is added to H2 it would go into a ANSWER: σ* molecular orbital and strengthen the H–H bond. σ molecular orbital and strengthen the H–H bond. σ molecular orbital and weaken the H–H bond. σ* molecular orbital and weaken the H–H bond. Chapter 5 Question 91 - Multiple Choice Part A The paramagnetism of O2 is explained by ANSWER: molecular orbital theory. resonance. valence bond theory. coordinate covalent bonding. Chapter 5 Question 103 - Multiple Choice Part A
What is the geometry around the central atom in the following molecular model of PH3?
ANSWER: linear bent trigonal pyramidal tetrahedral Chapter 5 Question 114 - Multiple Choice Part A What is the geometry around the central atom in the following molecular model of PF6-?
ANSWER: trigonal bipyramidal octahedral square pyramidal square planar Chapter 5 Question 178 - Multiple Choice Part A Which drawing represents the lowest energy unoccupied molecular orbital in the N2 molecule in its ground state? ANSWER:
