Question 1

Boron never achieves an octet in any of its compounds.

Accepted Answer

A) True 
 B)False

Question 2

What is the molecular shape of HOF as predicted by the VSEPR theory?

Accepted Answer

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

Question 3

In the nitrate ion (NO3-) , nitrogen and oxygen are held together by

Accepted Answer

A)   ionic interactions.
B)   covalent bonds.
C)   dative bonds.
D)   electronegativity.
E)   network bonds.

Question 4

How many electron pairs are shared between the carbon atoms in C2H4?

Accepted Answer

A)   5
B)   4
C)   3
D)   2
E)   1

Question 5

According to VSEPR theory, a molecule with the general formula AX5E will have a ______ molecular shape.

Accepted Answer

A)   tetrahedral
B)   trigonal bipyramidal
C)   square pyramidal
D)   octahedral
E)   see-saw

Question 6

According to VSEPR theory, a molecule with the general formula AX2E3 will have a _____ molecular shape.

Accepted Answer

A)   bent
B)   linear
C)   trigonal planar
D)   T-shaped
E)   trigonal pyramidal

Question 7

What is the molecular shape of ClO3F as predicted by the VSEPR theory? 3F as predicted by the VSEPR theory?   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 8

Explain what is meant by "dipole moment", and give an example of a molecule which has polar bonds but which does not itself have a dipole moment.

Accepted Answer

A dipole moment arises in a molecule whe...

Question 9

According to VSEPR theory, a molecule with the general formula AX3E2 (where E represents a lone pair on
A) will be trigonal planar.

Accepted Answer

A) True 
 B)False

Question 10

How many resonance structures are possible for NO3-?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5

Question 11

Which one of the following molecules and ions will have a planar geometry?

Accepted Answer

A)   PCl3
B)   BF4-
C)   XeF4
D)   BrF5
E)   H3O+

Question 12

Phosphoryl iodide is used in the preparation of organophosphorus derivatives and phosphate esters. Select the Lewis structure for POI3 which minimizes formal charges.

Accepted Answer

A)   3 which minimizes formal charges. 
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Question 13

What is the molecular shape of SiF62- as predicted by the VSEPR theory? 62- as predicted by the VSEPR theory?   A)  trigonal bipyramidal B)  hexagonal C)  tetrahedral D)  see-saw E)  octahedral" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   trigonal bipyramidal
B)   hexagonal
C)   tetrahedral
D)   see-saw
E)   octahedral

Question 14

Hydrazine, N2H4, is a good reducing agent that has been used as a component in rocket fuels. Select its Lewis structure.

Accepted Answer

A)   2H4, is a good reducing agent that has been used as a component in rocket fuels. Select its Lewis structure. 
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D)     
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B)   2H4, is a good reducing agent that has been used as a component in rocket fuels. Select its Lewis structure. 
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C)   2H4, is a good reducing agent that has been used as a component in rocket fuels. Select its Lewis structure. 
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D)   2H4, is a good reducing agent that has been used as a component in rocket fuels. Select its Lewis structure. 
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E)   None of the above is correct.

Question 15

In which one of the following species is the best Lewis structure a resonance structure?

Accepted Answer

A)   NH3
B)   CO2
C)   SF6
D)   O2
E)   CO32-

Question 16

Predict the actual bond angle in SeCl2 using the VSEPR theory.

Accepted Answer

A)   more than 120°
B)   between 109° and 120°
C)   between 90° and 109°
D)   exactly 90°
E)   less than 90°

Question 17

Which one of the following molecules does not have a dipole moment?

Accepted Answer

A)   CS2
B)   H2S
C)   CH2Cl2
D)   PH3
E)   CH2O

Question 18

Select the correct Lewis structure for nitrogen trifluoride, NF3.

Accepted Answer

A)   3. 
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Question 19

What is the molecular shape of N2O as predicted by the VSEPR theory? 2O as predicted by the VSEPR theory?   A)  trigonal pyramidal B)  trigonal planar C)  angular D)  bent E)  linear" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 20

Predict the ideal bond angles in AsCl3 using the molecular shape given by the VSEPR theory.

Accepted Answer

A)   90°
B)   109°
C)   120°
D)   180°
E)   between 110 and 120°

Exam 10: The Shapes of Molecules

According to VSEPR theory, a molecule with the general formula AX3E2 (where E represents a lone pair on A) will be trigonal planar.

Correct AnswerverifiedShow Answer

How many resonance structures are possible for NO3-?

Correct AnswerverifiedShow Answer

According to VSEPR theory, a molecule with the general formula AX2E3 will have a _____ molecular shape.

Correct AnswerverifiedShow Answer

Explain what is meant by "dipole moment", and give an example of a molecule which has polar bonds but which does not itself have a dipole moment.

Correct AnswerverifiedA dipole moment arises in a molecule whe...View AnswerShow Answer

Phosphoryl iodide is used in the preparation of organophosphorus derivatives and phosphate esters. Select the Lewis structure for POI3 which minimizes formal charges.

Correct AnswerverifiedShow Answer

What is the molecular shape of HOF as predicted by the VSEPR theory?

Correct AnswerverifiedShow Answer

Which one of the following molecules does not have a dipole moment?

Correct AnswerverifiedShow Answer

In the nitrate ion (NO3-) , nitrogen and oxygen are held together by

Correct AnswerverifiedShow Answer

Hydrazine, N2H4, is a good reducing agent that has been used as a component in rocket fuels. Select its Lewis structure.

Correct AnswerverifiedShow Answer

According to VSEPR theory, a molecule with the general formula AX5E will have a ______ molecular shape.

Correct AnswerverifiedShow Answer

Select the correct Lewis structure for nitrogen trifluoride, NF3.

Correct AnswerverifiedShow Answer

What is the molecular shape of ClO3F as predicted by the VSEPR theory?

Correct AnswerverifiedShow Answer

Predict the ideal bond angles in AsCl3 using the molecular shape given by the VSEPR theory.

Correct AnswerverifiedShow Answer

Which one of the following molecules and ions will have a planar geometry?

Correct AnswerverifiedShow Answer

Predict the actual bond angle in SeCl2 using the VSEPR theory.

Correct AnswerverifiedShow Answer

What is the molecular shape of SiF62- as predicted by the VSEPR theory?

Correct AnswerverifiedShow Answer

Boron never achieves an octet in any of its compounds.

Correct AnswerverifiedShow Answer

How many electron pairs are shared between the carbon atoms in C2H4?

Correct AnswerverifiedShow Answer

In which one of the following species is the best Lewis structure a resonance structure?

Correct AnswerverifiedShow Answer

What is the molecular shape of N2O as predicted by the VSEPR theory?

Correct AnswerverifiedShow Answer

According to VSEPR theory, a molecule with the general formula AX₃E₂ (where E represents a lone pair on A) will be trigonal planar.

Correct Answer
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How many resonance structures are possible for NO₃^-?

Correct Answer
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According to VSEPR theory, a molecule with the general formula AX₂E₃will have a _____ molecular shape.

Correct Answer
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Correct Answer
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A dipole moment arises in a molecule whe...
View Answer

Phosphoryl iodide is used in the preparation of organophosphorus derivatives and phosphate esters. Select the Lewis structure for POI₃ which minimizes formal charges.

Correct Answer
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Correct Answer
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Correct Answer
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In the nitrate ion (NO₃^-) , nitrogen and oxygen are held together by

Correct Answer
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Hydrazine, N₂H₄, is a good reducing agent that has been used as a component in rocket fuels. Select its Lewis structure.

Correct Answer
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According to VSEPR theory, a molecule with the general formula AX₅E will have a ______ molecular shape.

Correct Answer
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Select the correct Lewis structure for nitrogen trifluoride, NF₃.

Correct Answer
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What is the molecular shape of ClO₃F as predicted by the VSEPR theory?

Correct Answer
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Predict the ideal bond angles in AsCl₃using the molecular shape given by the VSEPR theory.

Correct Answer
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Correct Answer
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Predict the actual bond angle in SeCl₂using the VSEPR theory.

Correct Answer
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What is the molecular shape of SiF₆^2-as predicted by the VSEPR theory?

Correct Answer
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Correct Answer
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How many electron pairs are shared between the carbon atoms in C₂H₄?

Correct Answer
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Correct Answer
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What is the molecular shape of N₂O as predicted by the VSEPR theory?

Correct Answer
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