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Covalent Compounds

Total questions: 46

Worksheet time: 24mins

Name
Class
Date
1.

A molecule with a single covalent bond is

a)

Cl2

b)

N2

c)

O2

d)

CO

2.

Which of the following are the weakest bonds?

a)

nonpolar covalent bonds

b)

ionic bonds

c)

dipole interactions

d)

hydrogen bonds

3.

The ammonium ion (NH4+) is

a)

bent

b)

octahedral

c)

square planar

d)

tetrahedral

4.

The PCl5 molecule is

a)

trigonal pyramidal

b)

octahedral

c)

trigonal bipyramidal

d)

tetrahedral

5.

Which of the following are the strongest bonds?

a)

nonpolar covalent bonds

b)

London dispersion forces

c)

dipole interactions

d)

hydrogen bonds

6.

A covalent bond formed between two elements that have an electronegativity difference of 1.8 would be

a)

moderately polar covalent

b)

very polar covalent

c)

ionic

d)

nonpolar covalent

7.

A covalent bond formed between two elements that have an electronegativity difference of 0.3 would be

a)

moderately polar covalent

b)

very polar covalent

c)

ionic

d)

nonpolar covalent

8.

A covalent bond formed between two elements that have an electronegativity difference of 2.3 would be

a)

moderately polar covalent

b)

very polar covalent

c)

ionic

d)

nonpolar covalent

9.

A covalent bond formed between two elements that have an electronegativity difference of 0.7 would be

a)

moderately polar covalent

b)

very polar covalent

c)

ionic

d)

nonpolar covalent

10.

If a bonding pair of electrons is shared equally between two atoms, the bond is

a)

nonpolar covalent.

b)

ionic.

c)

coordinate covalent

d)

polar covalent.

11.

If a bonding pair of electrons is shared unequally between two atoms, the bond is

a)

nonpolar covalent.

b)

ionic.

c)

coordinate covalent

d)

polar covalent.

12.

Which of the following compounds is not covalent?

a)

NaCl

b)

CH4

c)

SO2

d)

HBr

13.

Which of the following molecules has one lone pair of electrons?

a)

CO2

b)

H2O

c)

BCl3

d)

SO2

14.

Which of the following compounds composed of polar covalent molecules?

a)

SF6

b)

CH4

c)

SO2

d)

CO2

15.

How many valence electrons does any halogen have?

a)

1

b)

2

c)

6

d)

7

16.

Which of the following molecules has two lone pairs of electrons?

a)

CO2

b)

H2O

c)

BCl3

d)

SO2

17.

Which two elements below exist as diatomic molecules?

a)

N

b)

He

c)

B

d)

I

18.

Which element below does not exist as a diatomic molecule?

a)

N

b)

O

c)

S

d)

I

19.

Which molecule below is held together by a double bond?

a)

N2

b)

I2

c)

O2

d)

F2

20.

Which molecule below is held together by a triple covalent bond?

a)

CO

b)

I2

c)

O2

d)

F2

21.

A covalent bond forms

a)

when electrons are transferred from one atom to another.

b)

when atoms share electrons.

c)

between metals and nonmetals.

d)

when an element becomes a noble gas.

22.

The force that occurs when a hydrogen atom that is covalently bonded to a very electronegative atom is also weakly bonded to an unshared pair of electrons in the same or a nearby molecule

a)

hydrogen bond

b)

polar bond

c)

triple covalent bond

d)

nonpolar covalent bond

23.

a bond formed by the equal sharing of bonding electrons by two atoms

a)

polar covalent bond

b)

nonpolar covalent bond

c)

ionic bond

d)

coordinate covalent bond

24.

shows the arrangement of atoms in molecules and polyatomic ions

a)

chemical formula

b)

structural formula

c)

molecular formula

d)

Lewis formula

25.

shows the kinds of atoms and numbers present in a molecule of a compound

a)

chemical formula

b)

structural formula

c)

molecular formula

d)

Lewis formula

26.

formed between two atoms of different electronegativities in which the electrons are not shared equally

a)

nonpolar covalent bond

b)

double covalent bond

c)

polar covalent bond

d)

triple covalent bond

27.

formed between two pairs of electrons when each atom donates one pair of electrons to a bond

a)

polar covalent bond

b)

single covalent bond

c)

double covalent bond

d)

triple covalent bond

28.

occurs when three pairs of electrons are shared by two bonded atoms

a)

polar covalent bond

b)

single covalent bond

c)

double covalent bond

d)

triple covalent bond

29.

Which of the following is the correct Lewis structure for SF6?

a)
b)
c)
d)
30.
Which of the following is a polar molecule?
a)
CH4
b)
Xe
c)
H2O
d)
CO2
31.
Which molecule would have this molecular geometry?
a)
BF3
b)
CH4
c)
PCl5
d)
CO2
32.
What molecule could this be? 
a)
BF3
b)
CH4
c)
H2O
d)
CO2
33.
Who could this molecule be?
a)
CH4
b)
CO2
c)
PCl5
d)
BF3
34.
Who could this be?
a)
H2O
b)
NH3
c)
CO2
d)
CH4
35.
According to VSEPR, molecules adjust their shapes to keep which of the following as far away as possible?
a)
Pairs of valence electrons
b)
Inner shell electrons
c)
Mobile Electrons
d)
Electrons closest to the nucleus
36.

How many unshared pairs of electrons will a bent molecule have?

a)

0

b)

2

c)

3

d)

4

37.
In a polar bond, the more electronegative element will assume a partial ________ charge.
a)
positive
b)
negative
38.
Which of the following geometries could be nonpolar?
a)
bent
b)
tetrahedral
c)
trigonal pyrimidal
d)
none of the above
39.

Is this molecule polar or non-polar?

a)

Polar

b)

Non-polar

40.

Is this molecule polar or non-polar?

a)

Polar

b)

Non-polar

41.

Is this molecule polar or non-polar?

a)

Non-polar

b)

Polar

42.
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
43.
This is an example of a __________ bond.
a)
non-polar covalent
b)
polar covalent
c)
ionic
d)
metallic
44.
What geometry will this molecular structure have?: PH3
a)
bent
b)
tetrahedral
c)
linear
d)
trigonal pyramidal
45.
What geometry will this molecular structure have?: H2S
a)
bent
b)
tetrahedral
c)
linear
d)
trigonal pyramidal
46.

Which of the following structures is correct for PCl5?

a)
b)
c)
d)

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