Question 1

In which one of the following is the best Lewis structure a resonance structure? A)SO₃ B)BF₃ C)I₃^- D)SCO (C = central atom) E)SO₃^2-

Accepted Answer

E

Question 2

Select the correct Lewis structure for TeBr₂. A)a B)b C)c D)d E)e

Accepted Answer

E

Question 3

The formal charges on Cl and O in the structure shown for the ClO^- ion are,respectively A)0 and -1 B)-1 and 0 C)1 and -2 D)-2 and 1 E)None of these choices is correct.

Accepted Answer

A

Question 4

Which one of the following Lewis structures is definitely incorrect? 
A)a
B)b
C)c
D)d
E)e

Accepted Answer

The answer of Which one of the following Lewis structures...

Question 5

Select the Lewis structure for XeO₂F₂ which correctly minimizes formal charges. A)a B)b C)c D)d E)e

Accepted Answer

To minimize formal charges, we want to distribute the electrons in such a way that each atom has a formal charge as close to zero as possible. In this case, we can achieve this by placing a double bond between Xe and O, and single bonds between Xe and both F atoms, B atoms, and S atoms. This gives the Xe atom a formal charge of zero and the surrounding atoms each have a formal charge of -1. The structure in choice B satisfies these requirements, while the other structures have atoms with formal charges that deviate farther from zero.

Question 6

Hydrazine,N₂H₄,is a good reducing agent that has been used as a component in rocket fuels.Select its Lewis structure. A)a B)b C)c D)d E)None of these choices is correct.

Accepted Answer

The Lewis structure for hydrazine has two nitrogen atoms bonded to each other with single bonds and each nitrogen atom also bonded to two hydrogen atoms with single bonds. This gives a total of four single bonds and one lone pair on each nitrogen atom. The lone pairs are shown as dots in the Lewis structure. Option C accurately shows this arrangement of atoms and lone pairs.

Question 7

Which one of the following Lewis structures is definitely incorrect? 
A)a
B)b
C)c
D)d
E)e

Accepted Answer

The answer of Which one of the following Lewis structures...

Question 8

In which one of the following is the best Lewis structure a resonance structure? (central atoms are bold) A)CO₂ B)ClO₃^- C)COCl₂ D)NO₂⁺ E)HCN

Accepted Answer

In ClO, the Lewis structure with the double bond between Cl and O is a major contributor to the overall structure, but it cannot fully describe the molecule. There is also significant contribution from the Lewis structure with a single bond between Cl and O and a negative charge on O. Therefore, ClO has resonance structures and is best described by a combination of multiple Lewis structures.

Question 9

In the following Lewis structure for ClO₃F,chlorine has a formal charge of ____ and an oxidation number of ____. A)7,7 B)7,-1 C)1,1 D)1,-1 E)1,7

Accepted Answer

The answer of In the following Lewis structure for ClO₃F,chlorine...

Question 10

Which one of the following Lewis structures is definitely incorrect? 
A)a
B)b
C)c
D)d
E)e

Accepted Answer

The answer of Which one of the following Lewis structures...

Question 11

Select the correct Lewis structure for nitrogen trifluoride,NF₃. A)a B)b C)c D)d E)e

Accepted Answer

The answer of Select the correct Lewis structure for nitrogen...

Question 12

Oxygen difluoride is a powerful oxidizing and fluorinating agent.Select its Lewis structure. 
A)a
B)b
C)c
D)d
E)None of these choices is correct.

Accepted Answer

The answer of Oxygen difluoride is a powerful oxidizing and...

Question 13

Select the Lewis structure in which formal charges are minimized for the periodate anion,IO₄^-. A)a B)b C)c D)d E)e

Accepted Answer

The answer of Select the Lewis structure in which formal...

Question 14

In the following Lewis structure for phosphate,phosphorus has a formal charge of ____ and an oxidation number of ____. 
A)0,-3
B)0,5
C)5,-3
D)5,5
E)3,5

Accepted Answer

The answer of In the following Lewis structure for phosphate,phosphorus...

Question 15

Select the best Lewis structure for ClCN. 
A)a
B)b
C)c
D)d
E)e

Accepted Answer

The answer of Select the best Lewis structure for ClCN....

Question 16

Select the best Lewis structure for P₂I₄. A)a B)b C)c D)d E)None of these structures is suitable for P₂I₄.

Accepted Answer

The answer of Select the best Lewis structure for P₂I₄....

Question 17

In which of the following does the nitrogen atom have a formal charge of -1? 
A)a
B)b
C)c
D)d
E)e

Accepted Answer

In option C, the nitrogen atom has 4 valence electrons (2 from the lone pair and 1 from each of the two bonds) and so it has a formal charge of -1 (5 valence electrons - 6 electrons in the structure). In options A, B, D, and E, the nitrogen atom does not have a formal charge of -1.

Question 18

Phosphoryl iodide is used in the preparation of organophosphorus derivatives and phosphate esters.Select the Lewis structure for POI₃ which minimizes formal charges. A)a B)b C)c D)d E)e

Accepted Answer

The answer of Phosphoryl iodide is used in the preparation...

Question 19

Select the correct Lewis structure for NOCl,a reactive material used as an ionizing solvent. 
A)a
B)b
C)c
D)d
E)None of these choices is correct.

Accepted Answer

The answer of Select the correct Lewis structure for NOCl,a...

Question 20

Thionyl chloride is used as an oxidizing and chlorinating agent in organic chemistry.Select the best Lewis structure for SOCl₂. A)a B)b C)c D)d E)None of these structures is suitable for SOCl₂.

Accepted Answer

The answer of Thionyl chloride is used as an oxidizing...

Quiz 10: The Shapes of Molecules

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

Select the correct Lewis structure for TeBr₂.

The formal charges on Cl and O in the structure shown for the ClO^- ion are,respectively

Which one of the following Lewis structures is definitely incorrect?

Select the Lewis structure for XeO₂F₂ which correctly minimizes formal charges.

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

Which one of the following Lewis structures is definitely incorrect?

In which one of the following is the best Lewis structure a resonance structure? (central atoms are bold)

In the following Lewis structure for ClO₃F,chlorine has a formal charge of and an oxidation number of .

Which one of the following Lewis structures is definitely incorrect?

Select the correct Lewis structure for nitrogen trifluoride,NF₃.

Oxygen difluoride is a powerful oxidizing and fluorinating agent.Select its Lewis structure.

Select the Lewis structure in which formal charges are minimized for the periodate anion,IO₄^-.

In the following Lewis structure for phosphate,phosphorus has a formal charge of and an oxidation number of .

Select the best Lewis structure for ClCN.

Select the best Lewis structure for P₂I₄.

In which of the following does the nitrogen atom have a formal charge of -1?

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

Select the correct Lewis structure for NOCl,a reactive material used as an ionizing solvent.

Thionyl chloride is used as an oxidizing and chlorinating agent in organic chemistry.Select the best Lewis structure for SOCl₂.

Quiz 10: The Shapes of Molecules

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

Select the correct Lewis structure for TeBr2.

The formal charges on Cl and O in the structure shown for the ClO- ion are,respectively

Which one of the following Lewis structures is definitely incorrect?

Select the Lewis structure for XeO2F2 which correctly minimizes formal charges.

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

Which one of the following Lewis structures is definitely incorrect?

In which one of the following is the best Lewis structure a resonance structure? (central atoms are bold)

In the following Lewis structure for ClO3F,chlorine has a formal charge of ____ and an oxidation number of ____.

Which one of the following Lewis structures is definitely incorrect?

Select the correct Lewis structure for nitrogen trifluoride,NF3.

Oxygen difluoride is a powerful oxidizing and fluorinating agent.Select its Lewis structure.

Select the Lewis structure in which formal charges are minimized for the periodate anion,IO4-.

In the following Lewis structure for phosphate,phosphorus has a formal charge of ____ and an oxidation number of ____.

Select the best Lewis structure for ClCN.

Select the best Lewis structure for P2I4.

In which of the following does the nitrogen atom have a formal charge of -1?

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

Select the correct Lewis structure for NOCl,a reactive material used as an ionizing solvent.

Thionyl chloride is used as an oxidizing and chlorinating agent in organic chemistry.Select the best Lewis structure for SOCl2.

Select the correct Lewis structure for TeBr₂.

The formal charges on Cl and O in the structure shown for the ClO^- ion are,respectively

Select the Lewis structure for XeO₂F₂ which correctly minimizes formal charges.

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

In the following Lewis structure for ClO₃F,chlorine has a formal charge of and an oxidation number of .

Select the correct Lewis structure for nitrogen trifluoride,NF₃.

Select the Lewis structure in which formal charges are minimized for the periodate anion,IO₄^-.

In the following Lewis structure for phosphate,phosphorus has a formal charge of and an oxidation number of .

Select the best Lewis structure for P₂I₄.

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

Thionyl chloride is used as an oxidizing and chlorinating agent in organic chemistry.Select the best Lewis structure for SOCl₂.