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2025 LT 11: Resonance, Hybridization, Formal Charges

Total questions: 41

Worksheet time: 49mins

Name
Class
Date
1.
Calculate the Formal Charge for the Oxygen Labeled 1 
a)
-1
b)
+1
c)
0
d)
-2
2.
Calculate the Formal Charge for the Nitrogen
a)
-1
b)
+1
c)
0
d)
-2
3.
What is the formal charge for Xenon
a)
-1
b)
+1
c)
0
d)
+2
4.
How many resonance structures for NO3- ion?
a)
1
b)
2
c)
3
d)
4
5.
What is the bond order for NO3- ion?
a)
1
b)
1.5
c)
2
d)
1.3
6.

What is the bond order between S and O?

a)

1

b)

1.5

c)

2

d)

3

7.

This carbon atom went through ....

a)

sp hybridization

b)

sp2 hybridization

c)

sp3 hybridization

d)

dsp3 hybridization

8.

What is the hybridization of this molecule shown above

a)

sp

b)

sp2

c)

sp3

d)

sp4

9.

Two carbon atoms form a linear shaped ethene, C2H4, molecule when bonded with four other hydrogen atoms. Prior to bonding, the carbon atom

a)

does not hybridize

b)

undergoes sp hybridization

c)

undergoes sp2 hybridization

d)

undergoes sp3 hybridization

10.
How many sigma bonds does this have? 
a)
1
b)
2
c)
3
d)
4
11.
How many pi bonds does this have? 
a)
1
b)
2
c)
3
d)
4
12.
How many sigma and pi bonds does this have?
a)
1 sigma and 1 pi
b)
2 sigma and 1 pi
c)
1 sigma and 2 pi
d)
2 sigma and 2 pi
13.

Compounds that are composed of the same number and type of atoms but have them arranged in different ways are ___________.

a)

isomers

b)

isotopes

c)

polymers

d)

alkanes

14.

In a stereoisomer, ________ means "on the same side" and ______ means "across from."

a)

cis; trans

b)

cis; L

c)

D; L

d)

trans; cis

15.

Given the formula representing a compound:


Which formula represents an isomer of this compound?

a)
b)
c)
d)
16.

Is the following molecule polar or nonpolar?

a)

polar

b)

nonpolar

17.

Is the following molecule polar or nonpolar?

a)

polar

b)

nonpolar

18.

Is the following molecule polar or nonpolar?

a)

polar

b)

nonpolar

19.

Is the following molecule polar or nonpolar?

a)

polar

b)

nonpolar

20.
For carbonate ions, how many resonance structures can be drawn ?
a)
2
b)
3
c)
4
d)
5
21.
What is the bond order for CO32- ion?
a)
1
b)
1.5
c)
2
d)
1.33
22.

What is the picture showing?

a)

All of the resonance structures for carbonate.

b)

The formal charge on each atom in carbonate.

c)

The electronegativity for carbonate.

d)

The ionization energy for carbonate.

23.

What is the name for when more than one valid Lewis structure can be drawn for a molecule?

a)

coordinate covalent bond

b)

resonance

c)

endothermic

d)

structural formula

24.
Which molecule exhibits resonance? 
a)
O3
b)
BeCl2
c)
CO2
d)
NF3
25.
What are the formal charges on the boron and nitrogen in the compounds BF3 and NH3
a)
-2 and +2
b)
+2 and –2                             
c)
0 and 0
d)
+1 and –1
26.

Based on formal charge and the the Lewis dot structure rules, which of the following would be correct Lewis structure for N2O?

a)

A

b)

B

c)

C

d)

C

27.
Draw the Lewis Structure for CHO2-1 Which of the following is a correct statement?
a)
Oxygen is the center atom of this molecule
b)
CHO2 -1 is a resonance structure 
c)
Formal charge of Carbon is -1
d)
Total of 17 Valence Electrons
28.

How many resonance structures can be drawn for NOCl?

a)

0

b)

1

c)

2

d)

3

29.

C6H6 has two resonance structures. This best supports which statement below?

a)

All bonds between carbon atoms have the same length.

b)

C6H6 is a good conductor of electricity.

c)

The bonds are unstable and the compound will decompose quickly.

d)

The molecule always has 3 single C-C bonds and 3 double C-C bonds.

30.

What is the advantage of expanding the octet in the SO2 Lewis structure?

a)

the formal charges drop to zero for all atoms

b)

the bond order is a whole number

c)

it makes the molecule linear instead of bent

d)

it creates a dative covalent bond

31.

Based on formal charge, which Lewis structure best represents a sulfuric acid molecule?

a)

Structure A is the better structure because all of its atoms have a formal charge of zero.

b)

Structure A is the better structure because NOT all of its atoms have a formal charge of zero.

c)

Structure B is the better structure because all of its atoms have a formal charge of zero.

d)

Structure B is the better structure because NOT all of its atoms have a formal charge of zero.

32.

Which of the following molecules are structural isomers?

a)

I and III

b)

III and IV

c)

I and II

d)

II and III

33.

Which structure has the shortest bonds?

a)

a.

b)

b.

34.
Polar, Nonpolar, or ionic?
a)
nonpolar
b)
polar
35.

Is the following molecule polar or nonpolar?

a)

polar

b)

nonpolar

36.
Diagram below shows
a)
formation of hybrid orbital
b)
atomic orbital overlap to produce hybrid orbital
c)
atomic orbital overlap to form sp hybrid orbital
d)
s orbital overlap with p orbital to form sp hybrid orbital
37.
Which of the statement is TRUE?
a)
s orbital overlap with p orbitals to form sp hybrid orbital
b)
s orbital with two p orbitals to form one sp2 hybrid orbital
c)
s orbital with two p orbitals to form two sp2 hybrid orbital
d)
s orbital with two p orbitals to form three sp2 hybrid orbital
38.

Does this molecule have polar bonds? Is the whole thing polar?

a)

Yes. No.

b)

Yes. Yes.

c)

No. Yes.

d)

No. No.

39.
CCl4 has polar bonds but is a non polar molecule. Why?
a)
bond polarity exist between atoms
b)
bond polarity between atoms cancel
c)
dipole moment exist between atoms in molecule
d)
difference in EN between C and Cl
40.

When you draw the direction of the dipole moment for the whole molecule (+-->) you draw the arrow pointing to what side?

a)

The negative end of the molecule

b)

The positive end of the molecule.

c)

The middle of the molecule.

41.
In this Lewis structure, the symbol above F means...
a)
electrons are being transferred to Fluorine
b)
electrons are less attracted to F than H
c)
electrons are more attracted to F than H
d)
Fluorine has formed a cation