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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Which of the following pairs of elements would most likely form a ionic compound?
A) Ca and Ni
B) Cu and Ar
C) F and s
D) Zn and K
2) Electronegativity is a concept that is useful along with other concepts in
A) deciding how many electrons are involved in bonding
B) deciding if double bonds are present in a molecule
C) formulating a statement of the octet rule
D) determining the number of single bonds present in a molecule
E) predicting the polarity of a bond
3) Which statement about electronegativity ts incorrect?
A) Within a periodic table group, electronegativity increases from bottom to top.
B) Metals generally have higher electronegativity values than nonmetals.
C) Within a periodic table row, electronegativity increases from left to right.
D) Fluorine is the most electronegative atom of all the elements.
4) Which of the following is the best notation for the bonding in the compound NaCl?
A) Na-Cl
B) b+ bNa-C1
C) b- b+
Na-Cl
D)Na+ ClE) none of these
5) Which of the following pairs rs incotectly matched?
formula
CuO
B) BBr3
C) CCla
D) KCI
E) IF
A)
bond typs
ionic
nonpolar covalent
polar covalent
ionic
nonpolar covalent
E) Na and Cl
6) \A/hich of the following pairs is incorrectly matched?
formula
MgO
B) CoS
C) CH+
D) NF3
E) NZ
A)
bond tvpe
ionic
ionic
polar covalent
polar covalent
nonpolar covalent
7) Elements in groups IIA and VA of the periodic table possess, respectively, how many vaience electrons?
A)2and6
B)2and2
C)6and2
D)3and4
E)2and5
8) \Ahich of the following statements about the noble gases is incorrect?
A) All have very stable electron arrangements.
B) They are the most reactive of all gases.
C) All have 8 valence electrons.
D) All exist in nature as individual atoms rather than molecular form.
9) Which of the following statements concerning double covalent bonds is correct?
A) They always involve the sharing of 2 eiectron pairs.
B) They are found only in molecules containing polyatomic ions.
C) They occur only between atoms containing 4 valence electrons.
D) They are found only in molecules containing S.
10) Choose the bond below that is the stronqest.
A) C=O
B) C=N
11) Which of the
A)
c) c-r
D) I-r
foilowing represent the Lewis structure for N?
'ry:
B;
:N:
C)
N.
D)
'ry:
12) \A4rich Lewis structure below correctly represents KCI?
A)K. I Cl ]B) K:
C1:
C) K.
[
D) :K:
E) C-F
,9' ]:C1:
E) none of the above
13) Lewis theory predicts that the formula for a compound between barium and sulfur is:
A)BaS
B) BaS2
C) BaS3
D)Ba2S
E) none of the above
E) I:l:
14) \iVhat is the correct Lewis structure for Br2?
A)
:Br= Br:
B) Br-Br
C)
:Br
-
Bi:
D) qi =qi
E) none of the above
15) V\4rat is the correct Lewis structure for CN-?
A) [:C= N:]B)
[c-N]-
c) t,S -
\' l-
D) [C =N:]E) none of the above
16) The correct Lewis structure for BF3 would have exactly:
A)
1 double bond
B) 2 double bonds
C) no double bonds
D)
1
triple bond
E) none of the above
t
5']\.-- .,/:'!'
- -./'-'-''\"
:Cl
-
CI:
n
m
[.=i-"].
[,'-Lo,]
C1
T"I
T
I
UI
rt\
/cl
17) Which response contains all of the Lewis structures that are incorrect as drawn? AII aalence electrons (electron dots)
for each atom must be accounted for.
A) I, il, and III
B) III, ry, and V
C) I and II
D) III and V
7
18) Which set shows the correct resonance structures for SeO2?
A) ,9-q:-9' --
9:q::9
B) O =Sb-O: .- :O-Sa:O
C) :O =Sb-O: *:O -Sb:O:
D)
:O =Se= O
-
:O= Se- O:
-
:O -Se= O:
E) SeO2 does not have a resonance structure.
19) \Mhat is the angle between electron groups in the trigonal planar electron geometry?
A) 180"
B) 120'
c) 109.5'
D)90.
E) not enough information
20) What is the molecular geometry if you have 4 single bonds and 0 lone pai.rs (nonbonding) around the central
atom?
A) tetrahedral
B) bent
C) trigonal pyramidal
D)linear
E) not enough information
21) What is the moiecular geometry of carbon dioxide, CO2?
A)bent
B) tetrahedral
C) trigonai pyramidal
D) linear
E) not enough information
22)\,hh'tatis the molecular geometry of SiH4?
A) trigonal pyramidal
B) linear
C)bent
D) tetrahedral
E) not enough information
23) How many of the following molecules are polar?
XeO2 SiCl2Br2 C2Br2
A)4
B)0
SeCl6
c)2
D)1
E)3
Answer Key
Testname: HONORS CHEMISTRY - CHEMICAL BONDINC PRACTICE EXAM
1) E
2)E
3)
B
4)D
s)
E
6) C
7)E
8) B
e) A
10)
11)
12)
13)
B
D
C
A
14) C
15)
A
16) C
17) D
18) B
re)
B
20)
A
27)D
22)D
23) C