Chemistry 51 - Fundamentals of Chemistry » Fall 2021 » Chapter 4 Homework
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Question #1
The dash representing a single covalent bond represents a pair of electrons.
A.
FALSE
B.
TRUE
Question #2
PCl5 is called phosphorus pentachloride.
A.
FALSE
B.
TRUE
Question #3
The N–H bond length is greater than the O–H bond length.
A.
TRUE
B.
FALSE
Question #4
Carbon has four electrons capable of forming covalent bonds.
A.
FALSE
B.
TRUE
Question #5
NaOH has both ionic bonds as well as covalent bonds.
A.
TRUE
B.
FALSE
Question #6
The sharing of electrons between atoms is called a(n) _____.
A.
mutual bond
B.
covalent bond
C.
ionic bond
D.
electronic bond
E.
hydrogen bond
Question #7
What is the maximum number of electrons that a hydrogen atom can share?
A.
One
B.
Zero
C.
Four
D.
Eight
E.
Two
Question #8
Which of the following can give rise to only a single bond?
A.
Carbon
B.
Oxygen
C.
Nitrogen
D.
Sulfur
E.
Hydrogen
Question #9
What is the molecular formula for bromine trifluoride?
A.
BrF3
B.
Br3F
C.
Br2F3
D.
(BrF)3
E.
3BrF
Question #10
Write the name for SF6?
A.
Hexasulfur fluoride
B.
Sulfur hexafluoride
C.
Hexafluoro sulfur
D.
Hexafluoro sulfide
E.
Sulfur hexafluorite
Question #11
Electronegativity measures
A.
the number of electrons needed to form an ionic bond.
B.
the strength of the ionic bond.
C.
how strongly an atom repels electrons.
D.
E.
the size of the valence shell.
F.
how strongly an atom attracts electrons.
Question #12
Which of the following has the shortest bond length?
A.
C ≡ C
B.
C– N
C.
C = C
D.
C = N
E.
C ≡ N
Question #13
Which of the following bonds would show the maximum polarity?
A.
O = O
B.
C = O
C.
C = C
D.
C = N
E.
N = N
Question #14
VSEPR theory is based on which one of the following?
A.
Repulsion between core electrons and valence electrons
B.
Attraction between nucleus and valence electrons
C.
Repulsion between electrons forming a covalent bond
D.
Mutual repulsion between protons
E.
Repulsion between nucleus and core electrons
Question #15
Why does CO2 have a linear shape, whereas SO2 has a bent shape?
A.
There is greater repulsion between oxygen atoms in CO2.
B.
There is a lone pair of electrons on the sulfur atom.
C.
Carbon has fewer number of electrons hence repulsion is lower.
D.
Carbon has fixed bonding angles.
E.
The covalent bond repulsion in sulfur is reduced due to a greater number of protons.
Question #16
Which of the following is an organic compound?
A.
CH4
B.
CO2
C.
SO2
D.
CO
E.
H2CO3
Question #17
A covalent bond that has equal sharing of electrons between the two nuclei is called a _______ covalent bond.
A.
polar
B.
nonpolar
Question #18
A triple bond involves the sharing of _______ electrons.
A.
3
B.
6
Question #19
Ethyne has _______ covalent bonds between the two carbon atoms.
A.
2
B.
3
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