Name
IB Chem I
Topic 4 Bonding - SampleTestProblems
1.
What is the fonnula for the compoundformedby calciumand nitrogen?
A.
CaN
B.
Ca2N
C.
Ca2N3
@
ca3N2
ElernentXis in group2, andelementIin group7, of the periodictable.Which ions willbe presentin the
compoundformed when Xand Y reacttogether?
A.
-^
\y
f
X'- and Y
1_andf
C.
D.
3.
f
andY'
in the sequenceof molecules
for the bondingbetweencarbon.atoms
Which of the following increase(s)
CzHe,C2Haand C2112?
A.
,
U
4.
andY
I.
Numberof bondsF
II.
Lengthofbonds
Ill.
Strengthof bondingl/
I only
Iartd lll orrlv
C.
Illonly
D.
I, II and III
Whichmolecule
is linear?
A.
SOz
(8 . tco .
\-/
c.
D.
6.
HzS
Cl2O
Basedon electronegativity
values,which bond is the mostpolar?
A.
l€)
B-C
c-o
C.
N-O
D.
O-F
Which substanceis most solublein water(in rnol dur 3; at 2g8 K?
7.
A.
CH3CHj
B.
CH3OCH3
,^t.
( C. ) CHT CHTOH
\/
D.
8.
Which moleculeis nou-polar?
A.
G)
\./
9.
CH3CII2CH2CFI20H
H2CO
Sor
C.
NF:
D.
CHCI3
What happenswhen sodiumand oxygencombinetogether?
A.
ffi
Eachsodiumatourgainsone electron.
Eachsodiunratorr losesone electron.
C.
Eachoxygellator-ngainsone electron.
D.
Eachoxygenatornlosesone electron.
10.
Which substance
hasthe lowestelectricalconductivity?
A.
Cu(s)
B.
I-lg(l)
za
(S.r/ tttte'l
D.
Which staternent
bestdescribesthe attractionpresentin rnetallicbonding?
11.
A.
.Cl
(y
D.
the attractionbetweenprotorrsand electrons
Which statementis correctabouttwo elementswhoseatomsfonn a covalentbond with eachother?
(^aB.l
\-/
The elementsaremetals.
Tlreelerrrerrts
ille noll-uretals.
C.
The elementshavevery low electronegativity
values.
D.
The elemeutshavevery differentelectronegativity
values.
When the following bondtypesare listedin decreasing
orderof strengtli(strongestfirst), what is the
correct order?
A
( A/
covalerrt> hvdrogen> van der Waals'
B-
> van clerWaals'>hydrogen
covalerrt
C.
hydrogen> covalent> van der Waals'
D.
varrder Waals'>hvdrosen> covalent
What is the valenceshellelectronpair repulsion(VSEPR)theoryusedto predict?
A.
^rn
I B.)
\_t
ir.edg
the attractionbetweenpositiveionsand electrons
the attractionbetweenpositiveions and negativeions
A.
14.
the attractioubetweennucleiand electrons
C.
12.
13.
LiOH(aq)
The energylevelsin an atorn
Tlreslrapes
of urolecules
and ions
C.
The electronegativities
of elernents
D.
The typeof bondingin compounds
15.
Which fluorideis the rnostionic?
A.
NaF
z4,
csF
W
7
9'
MgFr
D.
BaF2
16.
Which statelnentis a correctdescriptionof electronlossin this reaction?
2Al+35-Al"S.
A.
-/f\
I B. I
\-/
17.
Eachaluminlluratoln losestwo electrons.
EachaluminLll.u
atom losesthreeelectrons.
C.
Eachsr-rlfur
atom losestwo electrons.
D.
Eachsulfur atornlosesthreeelectrons.
Which statementis true for most ionic compounds?
A.
They containelementsof similarelectronegativity.
B.
They conductelectricityin the solid state.
C.
Thev arecoloured.
@
18.
They havehigh rneltingandboilingpoints.
Wliich is a correctdescriptionof metallicbonding?
A.
Positivelychargedmetal ionsareattractedto negativelychargedions.
B.
Negatively chargedmetal ions are attractedto positively chargedrnetalions.
A.
t?
D.
19.
Positivelychargedmetal ions areattractedto delocalizedelectrons.
Negativelychargedmetal ionsare attractedto delocalizedelectrons.
Whichmolecule
hasthesmallest
bondangle?
A.
COz
,(A
NH.
c.
cH+
D.
CzHq
\-/
20.
What intermolecularfbrcesare presentin gaseoushydrogen?
A.
Hydrogenbonds
B.
Covalerrtbonds
C.
Dipole-dipole
attractions
.-,
( D. I
\-,/
21.
22.
Which moleculeis polar?
A.
COz
('/F\
B, I
\-/
PF.
c.
cH+
D.
BF:
What are responsiblefbr the high electricalcorrductivityof metals?
A.
I'-\B. I
\-/
23.
positiveions
Delocalized
Delocalizcdr llcnce electrons
C.
Delocalized
atouls
D.
negativeions
Delocalized
When C2Ha, CzHz.and C2H6are arrangedin order of increasing C-C bond length,what is the corect
order?
A.
CzHo,C2H2.Czlla
B.
C2l16
CzH+,C2l-12.
( C.)
\./
CzHz.C2Ha,C2H6
D.
24.
Vander Waals'fbrces
CzHq,C2H6,C2H2
Whicli compoundcontainsboth ionic and covalentbonds?
A.
MgCl2
B.
HCI
C.
H2CO
@
NH4CI
Which specieshasa trigonalplanarshape?
25.
f;)
\-/
co.2-
B.
SO:2-
C.
NF:
D.
PCl3
In the moleculesN2lIa.N2H2,andN2, the nitrogenatomsare linkedby single,doubleand triple bonds,
respectively.
WItenthesemoleculesare arrangedin increasingorderof the lengthsof their nitrogento
nitrogenbonds(shortestbond first) which orderis correct?
A.
NzH+,N2,N2H2
B.
NzH+,N2H2.N2
C.
NzHz,N2,N2Fl1
@
27.
N2 ,N2H2,N2ta
Which compoundhasthe leastcovalentcharacter?
A.
SiO2
B.
Na2O
C.
MgC12
@
CsF
28.
,'2
Aq
fr/ +p/s*/Je-
29.
(a)
An irnpoftautcorrpoluldof nitrogenis ammonia,NH3. The chernistryof amrnoniais influencedby
its polarityand its ability to fonn hydrogenbonds.Polaritycan be explainedin tenns of
itv.
electronegativ
(i)
Explain tlre terrn electronegativity.
afuac'Aazt f?t sl
fle
€/ee/Yone t'l 4 ?ova,/ea*
/onJ.
( ii)
Nl
(iii) Statethe H-N-H bond anslein an arnuroniamolecule.
/o r o(iv)
(b)
Ammonia reactsrvith hydrogenionsforming ammoniutnions,NH4*
(i)
Statethe H-N-H bond anglein an aumonium ion.
/o?. ro
(ii)
Explainu,hy the H-N-H bond arrgleof NH3 is differentfrom the H-N-H bond angleof
NFI+*lref'erringto both speciesin your auswer.
e/e"*Tnc
u/i # 4I
/e/
30.
fgrce irt eacltof the following compounds.
Identifythe strongesttype of internroJecular
cH3cl
cH,
d:ig/e 7-a/Y9/3
v/afa det va/!;
, ,
(a/r'Y<ltyIr)
;.;; niilEq?;J;d
31.
The boiling pointso1-thehydridesof the group6 elementsare shownbelow.
(i)
( ii)
Explainthe trend in boiling pointsfrorn H2Sto H2Te.
\
,
32.
of iodine,sodiumand sodiumiodide.
the structures
The diasramsbelolv represent
(A, B and C) correspondto iodine,sodiurnand sodium
ldentify which of the structures
iodide.
(a)
A
,
Ilt
7
$: r v a
(ii)
(b)
(i)
(ii)
Sodiumand sodiumiodidecan both conductelectricitywhen molten,but only sodiumcan
conductelectricitywhen solid.Explainthis differencein conductivityin termsof the
33.
SiCla.are polar.but the rnoleculeis not.
Explail why the bondsin silicontetrachloride,
,
ftle
die
due
h
h
c/ 6".ilr c^r'e ,PeAr
i:)
nile
be,n,q ,n-fe
,
-be-,r,j
i;;:,
Ch/alrae
eh/u:ze
%a
Aat*;;a;5';a
i:;/ei;/i
if;' no/eeu/(
4A
Ua f,;
f,'c7u
ilJ
34.
(a)
{,:/,'
bouevel
2?4c
)si
.i s' ,f'e
i;;;ito
v
i;iio/aa:'
ueleft*i
r"/
acid,HCOOH.
Draw the Ler,visstructureof Ir-retltanoic
:o:
-
1l
..
I+ - f-rt O- l f..
-,
ll
(b)
(c)
Stateand explainthe relationshipbetweenthe lengthand strengthof the bondsbetweenthe carbon
atom aud the tr'vooxygenatonrsirt Inethanoicacid'
r^a c= a b;;,,1J,,i brth
ih;;/e/
=*i; ;;J
a
-M itiili
";tu";ir,
;trAcz1?:4t
;i;;:;|
^r?J a "t%;;LJ
;,F 4/2dz'o'a1'
W
i;;::T
do*A/e bon/'
e
4
/n
$o.nJ
10