Question 1

Which of the following molecules has a nonzero dipole moment?

Accepted Answer

A)  BeCl2
B)  SF2
C)  KrF2
D)  CO2
E)  CCl4

Question 2

What is the predicted O-C-O bond angle in CO2?

Accepted Answer

A)  60°
B)  90°
C)  109.5°
D)  120°
E)  180°

Question 3

Which is the most reasonable prediction for the three F-Br-F bond angles in BrF3?

Accepted Answer

A)  90°,90°,and 180°
B)  86°,94°,and 180°
C)  86°,86°,and 172°
D)  94°,94°,and 172°
E)  120°,120°,and 120°

Question 4

What is the hybridization of As in the AsF4- ion?

Accepted Answer

A)  sp
B)  sp2
C)  sp3
D)  sp3d
E)  sp3d2

Question 5

Which statement about orbital hybridization is incorrect?

Accepted Answer

A)  The carbon atom in CH4 is sp3 hybridized.
B)  The carbon atom in CO2 is sp hybridized.
C)  The nitrogen atom in NH3 is sp2 hybridized.
D)  sp2 hybrid orbitals are coplanar,and at 120° to each other.
E)  sp hybrid orbitals lie at 180° to each other.

Question 6

According to molecular orbital theory,what is the bond order in the O2+ ion?

Accepted Answer

A)  5.5
B)  5
C)  4
D)  2.5
E)  1.5

Question 7

Which is true for carbon monoxide?

Accepted Answer

A)  CO has a short CO bond.
B)  CO has a zero dipole moment.
C)  The bond energy in CO is low.
D)  The atoms in CO cannot obey the octet rule.
E)  All of the are true about CO.

Question 8

According to the VSEPR model,a molecule with the general formula AB2 with two lone pairs on the central atom will have a _____ molecular geometry.

Accepted Answer

A)  linear
B)  bent
C)  trigonal planar
D)  tetrahedral
E)  seesaw

Question 9

What is the predicted molecular geometry of the CH4 molecule according to the VSEPR model?

Accepted Answer

A)  tetrahedral
B)  trigonal pyramidal
C)  trigonal planar
D)  square planar
E)  seesaw

Question 10

According to the VSEPR model,the predicted molecular geometry of SiCl4 is

Accepted Answer

A)  linear.
B)  trigonal planar.
C)  bent.
D)  tetrahedral.
E)  trigonal pyramidal.

Question 11

Use the VSEPR model to predict the molecular geometry of H3O+ (hydronium ion).

Accepted Answer

Question 12

For a polyatomic ion having the general formula AB3n±,where A is an atom from Group 6A,B is an atom from Group 7A,and the ionic charge is n±,what charge must the ion have in order to yield a molecular geometry that is trigonal pyramidal?

Accepted Answer

A)  3-
B)  1-
C)  1+
D)  3+
E)  5+

Question 13

In not more than two sentences,explain when and why chemists make use of the concept of hybridization.

Accepted Answer

Chemists postulate hybridizati...

Question 14

In one sentence state the basic principle of valence bond theory.

Accepted Answer

A covalent bond forms when the...

Question 15

What is the molecular geometry of ClO3F as predicted by the VSEPR model? 3F as predicted by the VSEPR model?   A) trigonal pyramidal B) square planar C) square pyramidal D) tetrahedral E) octahedral" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  trigonal pyramidal
B)  square planar
C)  square pyramidal
D)  tetrahedral
E)  octahedral

Question 16

Pi bonds are covalent bonds in which the electron density is concentrated above and below the plane of the nuclei of the bonding atoms.

Accepted Answer

A) True 
 B)False

Question 17

Predict the molecular geometry and polarity of the CS2 molecule.

Accepted Answer

A)  linear,polar
B)  linear,nonpolar
C)  tetrahedral,nonpolar
D)  bent,nonpolar
E)  bent,polar

Question 18

Which one of the following molecules is polar?

Accepted Answer

A)  CH4
B)  CHBr3
C)  F2
D)  CBr4
E)  CO2

Question 19

Which has a dipole moment of zero?

Accepted Answer

A)  N2O
B)  NF3
C)  H2S
D)  SeO3
E)  CH3Cl

Question 20

What is the molecular geometry of NOCl as predicted by the VSEPR model?

Accepted Answer

A)  linear
B)  trigonal planar
C)  bent
D)  tetrahedral
E)  trigonal pyramidal

Exam 9: Chemical Bonding Ii Molecular Geometry and Bonding Theories

According to the VSEPR model,the predicted molecular geometry of SiCl4 is

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Which is the most reasonable prediction for the three F-Br-F bond angles in BrF3?

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Use the VSEPR model to predict the molecular geometry of H3O+ (hydronium ion).

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Which statement about orbital hybridization is incorrect?

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For a polyatomic ion having the general formula AB3n±,where A is an atom from Group 6A,B is an atom from Group 7A,and the ionic charge is n±,what charge must the ion have in order to yield a molecular geometry that is trigonal pyramidal?

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What is the molecular geometry of ClO3F as predicted by the VSEPR model?

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According to the VSEPR model,a molecule with the general formula AB2 with two lone pairs on the central atom will have a _____ molecular geometry.

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Which has a dipole moment of zero?

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What is the predicted O-C-O bond angle in CO2?

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Which of the following molecules has a nonzero dipole moment?

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In not more than two sentences,explain when and why chemists make use of the concept of hybridization.

Correct AnswerverifiedChemists postulate hybridizati...View AnswerShow Answer

Which one of the following molecules is polar?

Correct AnswerverifiedShow Answer

According to molecular orbital theory,what is the bond order in the O2+ ion?

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Pi bonds are covalent bonds in which the electron density is concentrated above and below the plane of the nuclei of the bonding atoms.

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What is the molecular geometry of NOCl as predicted by the VSEPR model?

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Which is true for carbon monoxide?

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In one sentence state the basic principle of valence bond theory.

Correct AnswerverifiedA covalent bond forms when the...View AnswerShow Answer

What is the predicted molecular geometry of the CH4 molecule according to the VSEPR model?

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Predict the molecular geometry and polarity of the CS2 molecule.

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What is the hybridization of As in the AsF4- ion?

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According to the VSEPR model,the predicted molecular geometry of SiCl₄ is

Correct Answer
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Which is the most reasonable prediction for the three F-Br-F bond angles in BrF₃?

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Use the VSEPR model to predict the molecular geometry of H₃O⁺ (hydronium ion).

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For a polyatomic ion having the general formula AB₃ⁿ^±,where A is an atom from Group 6A,B is an atom from Group 7A,and the ionic charge is n±,what charge must the ion have in order to yield a molecular geometry that is trigonal pyramidal?

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What is the molecular geometry of ClO₃F as predicted by the VSEPR model?

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According to the VSEPR model,a molecule with the general formula AB₂ with two lone pairs on the central atom will have a _____ molecular geometry.

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What is the predicted O-C-O bond angle in CO₂?

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Chemists postulate hybridizati...
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According to molecular orbital theory,what is the bond order in the O₂⁺ ion?

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A covalent bond forms when the...
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What is the predicted molecular geometry of the CH₄ molecule according to the VSEPR model?

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Predict the molecular geometry and polarity of the CS₂ molecule.

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What is the hybridization of As in the AsF₄^- ion?

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