CHEMISTRY 170-05 FINAL EXAM
GUIDE QUESTIONS AND ANSWERS
A chemical bond is classified as a covalent bond if it involves the transfer of
electrons.
True
False - ANSWER- FALSE
Boron forms compounds that violate the octet rule.
True
False - ANSWER- TRUE
Consider the following electronegativity values:
Which molecule below would you expect to have the more polar bond?
A) HF
B) H2
C) HCl
D) Cl2
E) F2 - ANSWER- A)
How does soap work?
,A) Soap works by making water into a non polar liquid which grease can
dissolve in.
B) Soap works by having a polar end and a non polar end which allows the
water and oil to interact indirectly.
C) Soap works by breaking grease molecules into smaller molecules that
dissolve in water.
D) Soap works by having a polar end which attaches to the grease molecule and
polarizes it and turns the grease molecule into another soap molecule. This is a
chain reaction.
E) none of the above - ANSWER- B)
How many lone electron pairs does the ClO (-1 charged) polyatomic anion
have?
A) three
B) one
C) six
D) two
E) none of the above - ANSWER- C)
,How many valence electrons are in the nitrate ion?
A) 26
B) 18
C) 23
D) 22
E) 24 - ANSWER- E)
Lewis structures only use the valence electrons in determining the bonding.
True
False - ANSWER- TRUE
Li : is the proper Lewis structure (dot structure) for lithium.
True
False - ANSWER- FALSE
The Lewis model predicts that the formula for a compound between fluorine
and calcium is:
A) CaF2
B) CaF3
, C) CaF
D) Ca2F
E) none of the above - ANSWER- A)
The Lewis model predicts that the formula for a compound between potassium
and sulfur is:
A) KS
B) K3S
C) K2S
D) KS2
E) none of the above - ANSWER- C)
The Lewis structure of water has two sets of lone pair electrons.
True
False - ANSWER- TRUE
The VSEPR theory predicts that the H-C-H angle in CH4 measures 120°.
True
GUIDE QUESTIONS AND ANSWERS
A chemical bond is classified as a covalent bond if it involves the transfer of
electrons.
True
False - ANSWER- FALSE
Boron forms compounds that violate the octet rule.
True
False - ANSWER- TRUE
Consider the following electronegativity values:
Which molecule below would you expect to have the more polar bond?
A) HF
B) H2
C) HCl
D) Cl2
E) F2 - ANSWER- A)
How does soap work?
,A) Soap works by making water into a non polar liquid which grease can
dissolve in.
B) Soap works by having a polar end and a non polar end which allows the
water and oil to interact indirectly.
C) Soap works by breaking grease molecules into smaller molecules that
dissolve in water.
D) Soap works by having a polar end which attaches to the grease molecule and
polarizes it and turns the grease molecule into another soap molecule. This is a
chain reaction.
E) none of the above - ANSWER- B)
How many lone electron pairs does the ClO (-1 charged) polyatomic anion
have?
A) three
B) one
C) six
D) two
E) none of the above - ANSWER- C)
,How many valence electrons are in the nitrate ion?
A) 26
B) 18
C) 23
D) 22
E) 24 - ANSWER- E)
Lewis structures only use the valence electrons in determining the bonding.
True
False - ANSWER- TRUE
Li : is the proper Lewis structure (dot structure) for lithium.
True
False - ANSWER- FALSE
The Lewis model predicts that the formula for a compound between fluorine
and calcium is:
A) CaF2
B) CaF3
, C) CaF
D) Ca2F
E) none of the above - ANSWER- A)
The Lewis model predicts that the formula for a compound between potassium
and sulfur is:
A) KS
B) K3S
C) K2S
D) KS2
E) none of the above - ANSWER- C)
The Lewis structure of water has two sets of lone pair electrons.
True
False - ANSWER- TRUE
The VSEPR theory predicts that the H-C-H angle in CH4 measures 120°.
True
