CAPE Chemistry Unit 2 Paper 1 (multiple choice) 2007

1. /
·.'·:tESTCong0:?;2140l0·. l' •• /. •• ~ :. . ·~ •. "' •
. ·.MAY/JliNE2007 .
.' '
~
·~ FORMTPioo7i73 ... . :•: ·;. : ;~- ..- .. ' .
···'. :·. ::-:,.:; ·.~. :·.. ~: ;·. ·•· : .. :. :·... . ..··..
. .. ·.. · .,_·.
NS CAREFULLy
1. In addition to this test booklet, y·ou should
. .
2. Each item in this testhas four suggested ~nc:Uh"•I"C!]ettered (A), (B), (c),q)). Read_..; e'ath item:you~re~·.:
aboutto answer and decidewhich choice is
3. On youranswersheet, find thenumberwh·
the same letteras the answer you have ch
orresponds ~oyo.ur iterri arid s~agethespacehaving ·
. Look ~it:ih€{~~TR)~;f~~~··~~~ow. ·
Sample Item
. Whichofthefollowingisthehighestenergy
(A)
(B)
(C)
(D)
n to cr*
n to 1t*
cr 'tO a*
1t 'tO 1t*
sition inanorganiccompo~nd?:
.SampleAnswer
. . .
.:.@ ..®:e.@
.~... . : . . .
The best answer to this item is "a 'tO a*", so ~tnc~-uvf~rspace (C) has been black~ned.
4."
5.
Ifyouwanttochangey~ura~swer,be.silreto
choice.
Whenyou aretold to begin,tu~ the.pageand
answer an item, omit itandgoonto the next
score will be the total numberofcorre6t<111,"VV.ul
6. You may do any rough work in this booklet.
7. Figures are not nece~sariJy drawn to scale.
8. The use ofnon-programmable calcu]ators is
youroldanswerco~pletely and fill inyournew
·asquicklyandasc~refully asyoucan. Ifyoucannot
You can come back to theharder item later:. Your
9. Thistestconsistsof45 items. You will have minutestoanswedhem.
I0. Do not be concerned thatthe answersheet pro ·desspaces for more answers than there are items in
this test.
DO NOT TURN THIS PAGE
Copy.right©2005 Caribbe
All rights
.....
_. ...........__.
-....3 R!i.--
YOU ARE.,TOL:P TO DO SO.
......

2. 1.
.·,~.,..;,;;~~~~~~::~~dL~',~;;;:.; · . .The rate equation for a reactio~l" -is~given-bj:~·;~·:.:;: '"3",.:":-: ~:·/(li~::iitt~·-equation for the reaction between
::er:ekc::mnt,k, • .~:-~:~:::···",~;;·::-..·~·:;r::~;~<::~!~;~~t::!:~~!::JI:~~:~~~.
(A)
(B}
(0)
(D)
·. ~- : : : ... ..:. :. ~ .. . ·..riiol dm"1.ati(fstconds respectively, the units
increases as tempeuiture increases .. {. .·.. . .. ::bft.be nite,constant, k, would be
decreases as temper-~ture in~r~a~es. ·· ·· ···. ··' ·· ·" ·· ·· ..· . - ..'
increases as concentration.increit.Sbs · "·. : ·: (ii.) mol dm-3
s'
decreases as concentration increases .(B) moP dm-6 s1
(C)
• 0 ~ • ••
(D)
dm6
mol-2
s-'
moP dm9 s1
2. Which ofthe follo~ing graphs refers to a zero
order reaction?
(A)
: . i '~.
..
. .- -·-. • . • ·.t . . .
Rate
-: ••· : ; .:_' t_ : .."! :. ~:~-: . :-."' ••• • :
Concentration ···
......
. .; .: -:- :'..- .
(B)
. : . •. .: ~
~ .:· ..
Concentration
(C)
Rate
· .....
Concentration·
_,..../
(D)
Rate
Concentration
GOONIO+HENEXTPAG~
.:OJ._.,.._ ··--
.& -~· ::·~a
.......... ·.:..· '·
r. ·~
I!

3. ...
"i
I
• 4.
-3-
Which ofthe following graphs represents t e
new shape ofthe.Boltzrruirjp di~tribut_ion wh n
. the temperature ·is.chan.ge'd f'rom'T/to a'lov ·f --.
tempera~re, T2
? .
(A)
No. of
molecules
with a
particu~ar
5. For.the equilib~ium,··
.. _. --~
2(~) ~-o~{~)---~-iNq(~j~~-H~+(89.k 1 moi-1
· which curv~· ~l;ow~:how lncrea5tng the total
.-..-.· .. p·~~~sur~--.o( :.tl)e sys_t~~-.:~ffects th~ yield of
the ·product?
(D)
energy 0/ 0
(B)
(C)
(D)
No. of
molecules
with a
particular
energy
No. of
molecules
with a
particular
energy
No. of _
~olecules
with a
particular
energy
022 120 l0/C2007
--------..~
.w ]·_a:-
Kinetic energy
Kinetic_ energy
~ ':
_lQn~t~c en_ergy
Tt
Kinetic energy
.:.·}-·:Yield:
~~~~~~~---~)
----(A)
··. "Par:ameter increase
..·.
. ,;·.'"
GOONTOTHENEXTPAGE
.....
·Z;a;;# i ·· -

4. -·i
h..,,
' .
·- 4- ...
~ref~rs to the follo~i_ng_information.' -~·. ··;·. ·, ...· ·..:·... :, .-~ .·· .·: :-.. :· ..
. . . .. ..... ; ,;.:.'·.·: :·t·~,;·':>:~·_:;;t·....~.;·:: :· ··.. :. ·; ·.."
The standard electro~e_potenti~ls ofchl~ti e, dich~om.~tC? ~:nd:it9.~.(III) iP~~-;;t.~~ a~ fol!6~~:..
6.
. .· . . . .· . ..· ... - .. • .. - ··.
: ~ i •
.: ·:-:
~ 1.36V.
+0.77V.
. ; _.,·.· ·.. :_: :. ~
•· i: -. :·.••
Which ofthe foU~wing eq~ations could re esent a feasible reacti6n?
(A)
(B)
{C)
(D)
•.
2Fe3
~(~q) + 2~~-~~q) ~ C12
(g) + 2
..... ·-.. ::.· ·... :;
Cr20 72- (aq) + 6Fel+(aq~ + 14~+(a ) --+ 2Cr+(aq) + 7H/>(I)_+ 6 Fe2+{aq)
3C~(g) +. cr~o~z-(aq).:t-)4H~(aq) i-:;.Y> ·
' • • ' • I • ~ , ' ::"): :. ·:·~?:
•. f·- .,.. ·'
..
·,·• i ;'".-·z~ • :~; ~-:
..
'•I',• o' •··
7. In which ofthe reactions below does ammo ia ~ha~e as a ~ronst~~ ~---~~ry base?
I. . N~ + HCI ~ NH4
CI
£: •• .. .:
·-
II. 2NH, + 3Cu0 ~ 3Cu _+3~0 + N
III. NH3. + C~COOH ~ NH4
+ + C} oo-
IV. Zn2
+ + 4~ -+ _[Zn ~)4]2
+
(A) I and III only .. .~ _:::: ·-~ :... -
(B) I and IV only
--:.·=·:_.--
(C) II and III only
(D) II and IV only
. :' :·
. ; .•_.
- •' ·.'
·..:.:·-
~.:;:~2J2010/C2007 -: ---·
GOO~IOTHENEXTPAGE ~~-
-:· : --:i- . : .. - - - - .
__:.......·.:....:.··-=-=====~.i54!F~g:..;;.!:j:·'":'

5. .: ~
·I.
l
i
.i
i
.1
•!;
'
~
:~
l
1
..
8.
'.
9.
10.
- 5-
Whic~ of the· foi.Jo~iqg·_.il~di~ator~ would
produce a sharp. colourchange in· tile titration
of a stro~g acid against a ~t~~~g base?
L
II.
III.
(A)
(B)
(C)
(D)
Indicator
· Methyl yellow
Bromocresol green
~h~nolp~~alein :.:
. Ilonly .
I a~d II.qnly:,·
II and in only .
I, I1 and Ill
pH range
2.9-4.0
3.8- 5.4
·. 8:2- 10.0
Which ofthe following is:true about a buffer
s61uti6n? -~ · · ·
(A) Normally c~msis;ts of :;t weak aciq
. and.its corresponding salt
(B) · Alters' the pH·of a. sol.1:1tion to the ·
·· desired pH~ ·
(C) Does not. change in pH on ·addition
~fla.rge amouf!ts ofaci4. or alkali
(D) Can a~t as ·a cataJyst in d~eaction ··
. - .· . . ·. . . . ~. ·. -· .. ·......
Wh~~h ofthe following does NOT describe a
.prop~rty ofthe buffering ~ction·o·famixture
12.
of ammonium chlorid_e and aqueo~..s J~.-
ammonia? · ·-
_:.Whiph ~~:n.~~H9.n. wjll_ giye a ..v.~J~.~ for t.he
·· ·hyd~~ge~-f~O.~.o?c~~~-{~HoP~.·(~~)in an acidic
.: buffer so1~tion? ·. ·
·. (A) (fi~r= K [Acid]
. a
. ·: (B) _[H+J.~-.Ka·[Acid] [Salt]
(y) [IYJ = R:_a rAc,i~l, .
. . .[ SaltJ .
. -:•.
. (D) . . . [H+] ·= K LQruti
. . .. a
: ·• · . [ACid]
•
Which::of ~he .._fello~ing statements is ·true
abou(K ?_. .• . Jp.•
. -
(A)· · At a given temperature, K, is the
· maximum amount of ionfc solid
; . ·:. . :·:4issplved in a.$aturat~4 solution.
.·(B) .·Ute.K;p of.an:ionic solid indicates the
·relative concentration .ofions that
. . fo!Jrl :a .pr~cipit~te i~ a .saturated
· :~oltition. ':· · · · ·
(C) As _te_Jilp~rature changes~ the K,P of
. : : a_n(ip!JiC sol_i~ re~a~ns th.e same.
.(D) . T.h~ K,P value of an ionic soli~ can
'·..:.1:?<1 obtained before s~turation point
· · ·~ ~ :;-'iS achieVed. · ··· · ·
.. :The sia~dar~':elec·trode potent.ial for the
..~~~~ti~n ·~n·~~:~:2~-.··t· Sn2
+ is E6
= +0.15V.
(A) · Ammoni~ molecules are basic.
(B) Chloride iops re~ct with hydrogen-..· -...
ions. .
';__ ·. ··-: B~~e.d .on tP:is infonnation ONLY, which of
· . the foll<:)wing statements would be true?
(C) ~onil,1m ions r~.a~twi~lihydroxide
tons.
(D) Ammonium chloride djssoc·ates
C<?mple~~ly in ~ater..
• 00 -_. : • I• 1 .__. ·~ }~ ": :• .··. •: .:;•"
I.·· · ·.Tin'is a strong reducing agent.
II.-- Tin produces many stable c·ompounds
in the +2 state. ·
III. Sn.4+ can oQ:itiize Cu2
+.
IV. The E8
Sn4+/Sn2+ is generated using
a standard hydrogen e_lectrode.
(A) I and _II only
(B) II and III only
(C) I and Illonly
(D) IVonly
GO ON TO THE NEXT PAGE
. ·- r.'l'11 ")()I {)/f"'}()()_l
-·~-
---¥#W: -
-·. ~ -
=~

6. 14.
15.
-6 -..
Which.two eled~odes below wilJ-f~rn1 ace11
with the latgesre:m.f?_··.;.
...··E·IV
I.
II.
III.
IV.
{A)
(B)
(C)
(D)
·:· ... :
Br2 -: 2e- ~.2 ~(
zn-z+ + 2e-: :;:zn!:_
+1..09
~.:.:0.76
MnO- + sfi++:se-· ~ Mn2++4H 0.·4 -t- 2
·+ 1.52:
F~3+ +. e- ·-4 Fe2+
....
~
+0.77
~...
I and III imly
land IV only··.
II and III only .. ·-··
II and IV only
..
The· s·tandard electrode potentials :-fo
dichromate and iodide·iu-e:- ' .: r ·
1/2 Cr2
0/-. (aq)"+)~~~~q) + Je- :?Crl~(aq
.+ 7/2 H20 ~ +1.33V .· ...
I2
(aq) + 2e- ~ 2I-(aq)_-~ ~0.54V
· From this it can b~ deduced that
(A)
(B)
(C)
(D)
.....
acidified dichromate ..ions would
oxidise iodide ions.to iodine
electi-~ns·. w-o~-ic(fJ~w' from t'h~·
dichromate halfcell" tcrthe iodine
halfcell ifthe two are connected
iodin~ would o~idise c~nmtium (Ill)
ions to dichromate·. .· _;
combining both.half -~~ns· would
produce a__c~IJ potenti~i of l.87V
i
;_;' .· Items 16-:and ·:17-.itefeFto··the graphs b¢low
:·... :·.'--~-- which:.~~ovi trends di.splayed· by elements in
· ._Period.J.....:· '::'.-'>< ·.<:,.. .=-:·'_" ··: ·
.. (A)
...·< .... ·.. :·:;, ·. ,; _: ~ ... ~- .·.: ..
.:..· .·
·. ~ .
·:(· I
p:· s Cl
(B)
• : •• !
p s CJ
..,··.-_ccr···
.-: :!•" ...... .
P S CJ
; ... . .....:_..i~..-.~:~.:...
(D)
..~ ~ : . ·.. . -.. ~ .•
~. _.;. ~-·.
. ··-: . ';: t .-~- ...: . -:.::_:,; ~ •. .·
.,:~
Na Mg AI Si P S Cl
. Match each of the items, below with one of
the options above. Each qption may be used
once, more than once or not at all.
16. Ionic radius
17. Melting point

7. f1
I
.i
/
~
.I
j
:I
lJI
I
:j
I
.J
]
.:!.,
l:t
;
i
!
.~
18.
19.
20.
21.·.
22.
-7 -.
Items ·18 and 19 refer to _tht?. follow ng
oxidation states. :·.· ~-
(A) +1
(~) +3
(C) +6 ..
(D) . +7
.. .. :
Match each underlined .~lement with ts
.oxidation.state. E~d{h~id~tion .state may be· ..
. used once;-.nor~ tha~~on~e ·or n~t at.aH. : .
Which ofthe following oxides has a_ s.im _le
molecular structure?·· · ·
(A)
(B)
(C)
(D)
Na2
0
Si02
Al2
0 3
S03
2~ ... -·.,WJ!qnpf)b~ foJlow.ing q~jd.e& of~leme.nts in
Oro~p t.Vi$ ~h~ .LEASTi~_iq~c in_character?
. . . . . ·. . ····.. .· .
(A)::~-_. :··l_-g9..0;:.. ·~
_(B) ..- :S.~q '· ._., ··.·-~ .. ·..
(C) ·..-:.- CO - : .·
-(D) ,CQ2
,· ..
.24. Whi~h qf_.th~ ."foljo_wing grap.hs MOST
.·.... -.··:.-···. ~~curat~.ly~.r~-~r.~~e_ntS)he treiJd· ~n~;volatility ·
_.ofchl9ri~e;:b.roniine..~~d iocline?~:. ·
. ·. "' .· . . .
...-.· ..~A)·.
I <::
Atomic number.·· ..
{B)
Which of the following -~tatemehts al;> t. · - ..
Group II elements are corre,ct? ·.' : ·· .
I.
ll.
III.
IV.
(A)
{B)
{C)
. (D)
Atomic r;1~iu_s ·in¥re~ses down t e
group. ··
Ionic radius de.creases down t e
group. . · . ::_:_. . .
Io~isation energy' de<;r·e-ases 4o
· the group.· ·
Sulp~ate solu~jlity·incr~~ down
·. grotiii· ··' ~-, ·· .·· .. :
I and III only
U _and UI ·only
I and IV only ··
'Il and IV only. ·
The metallic chara~ter ofGroup TV elemen s
increases down the gro"up ~ecause
(A) they are all reducing agents
(B) their melting points are high
(C) the +2 oxidation state becomes mo
stable
(D) atomic radius increases for eac
successive element
::·{C).
(D)
t;.O
.5 .0til·-
~:3
.... ~
( . ) -
c 0
- :>
Atomic nu~ber
Atomic number ..
Atomic number
GO QN TO Tl-IFNF_X.T.PA n-.:;
·= =: ...
------------------------------·--·"----·--·

8. J
J
J!
i
J
25.
26.
27.
(A)
(B)
(C)
(D)
The precipitate.fomied when iodide ions react
,vith AgNO/!tci) is· ;· ·.. ·~ .......·,
(A) soluble in dilute-nqueous·ammonia
(B) yellow silver ioelide .:·: ·. ·
(C) cream silver hydroxide
(D) soluble in nitric acid ···
'
Which of the following ~ay·be,.considered ··
true for transition elements? .. - ::'
. ....._
I. Their co·m_pounds are :u.sually
coloured. · ·
II. Thei.r:_out~r electr~ns lfe in partially
filled 'p' sub-le-yel~. . .
III. _They cah have .vari~ble. oxidation·
states.
IV. They usual~yhaye lo:w densities. ,
(A) II only··
(B) IVonly
(C) I and III only-
(D) II and fV only
. :
..
.The ground state configu_r~tioh for the copper ·.
atom is r'epresented by : .. -· . . .
3d :- 4s
[ArJ I t-t.·l t-1-l·t-t.l ti I t.J- I.[LJ
· .· 3d 4s
[ArJ I tt ·I tl I t*I t -1- 1· t:. I. ffi]
3d- ·. .-· ·. 4s
[Ar] I ti I t-1- l'tt I t-t,··l·ti.l [LJ
3d ~·: . 4s
[ArJ It~ -I t t It~:·l t-1- 1·-t ·· I ;[ill
28_, · --Which ofthe fo~lowipg species CANNOT act
as a ligand for transition metal complexes of
·Cr1+?
(A) H 2
0
(B) NH3
(C) NH.~
(D) c1-
.:·· ··, .:~Itemi'l9··refeis·to tlie:tabhi~which.-showS. the
.opservations:made }fl:;.ih:e.:qfi~)li~iive-'.analysis.
of two cations, X and Y, .Sing dilute NaOH
(aq) and Na2
C03
(aq). ·:· .~·-:
Cation NaOH(aq)
X White precipitate White .precipitate
•.•••.·:":. .1 •· insolubte·..in, .:··:";· : . :..
·.• :1_••-·;r::.: .ex.ces~·.; ....; ·.::: '.·.·'': :,·.~:... :· .
..•
..... .X.:. .. WNt~_.B~8ipi~at~.;.;;t .)~~qjt~ precipitate
soluble iri·excess· .... with effervescence.
G~&· gives a:white
~recipitate with
Ca (OH)2(aq)
29. The possible identities ofX and.Y are .
30.
:...,.·. :.x·- .·. ;y;:_...:~ ,.:··.-: .-.-:.:··. . .
(A) CaH ."Pb2+··,.: ..::,...<;.-·:··
.(B) . Mg~+ .AP~
(C) Ca2+ · Ba2+ ·. , ...
(D) Mg2~ Zn2+ .:: .. • · .
··. _.:._.:
···".
A student adds dilute· hydrochloric acid to a .
satnple._of copper sulphite.: Which of the
··.foiJowihgTeageiits .wou_ld:;NOI:'be a useful
·test for the gas :emitted?!·:: ~-;' ··.;_,·, '·· .. .
. .
·:'"' · _. ..._(A}· =.::<.Red litinus ·.-·· ·....:
(B) · Blue litmus..·· ·
= ···(tf:·.·:::N!Ao·~--~_.,fr'X~5tf~··:
.:<I?J..·~..s~~q/~J~f(~gi.:'...·.
(A)
(B)
(C)
. ·r~.J ....-! .f~.~- :_., .. ··: ·· l.
··compl¢.~~~i<?Jl.of. jmpurit~~s such as
.·sodium.siiic~i~ ·: · ,
prote~iJ~g.:th'e'_-:g~~phite .~r:t9de from
o2- ..i·o~s· · ··.· " ·- · ~ ·
providing'_ a ·lower· melting·.:p-oint
...:..:-~!i~~~~: .· i : .. · .. . .
. gent?r,atj.n_g AP~.. ic;m~. that are
dl~c·h~rged at the anode
'-.TF'F~Ttl TW~ "'TT:;"VT i.> A._G_C
~····= i ~ - . ___;.;;-..-:;;;;:::.=;;.._,-

9. r
j
1
l
,.
35.
36.
/
-9 ·-
.· Tp; w_l!at IS~ .c~.n..Jh~~ .:P~9-G.l!9.t~Jrpm JJ:lJ~
.. fractionl;ll d_i$t~lla~i~n·qfc~~-~ C?i.J .1?-~.put?. . . .
• •, • . • , r I 1 ~·:---:• :·: , ! .-, ,o •t 0 ,I •. ,, .. • , ...... ). • , , 0
. l.
·II.
III.
(A)
.,(J?).
.. .(C) .·
(D)
: ~a~~~g~&?.ftflg ',i ..
lxfak~pg ~~~~J~.s ._
Pn).~~_cing-~v~r&i.
...... . .. ·...• ~ .. . ..
nr~nly :·..:. _.>:-- .
I ~~d ll .only:.'.·... .
II -~n4j~ -only;:;.
.I, II.arid -lH ·;_
.·..··:
·...•
'.l' :.
3_3., Apply~ngJ..e_.~hat~li~r;s RDQ~ipl~ to the Haber
P!PG.~-~s:pre9j~ts th.a;~.·~-~igg ~r~s~~~e and low
t~·mper,~tuJ~;:·:ar_~J.id.~aLL ·. H.Q.wever, a
teinperat_ure·of400 to 500°~ is used. Why- is .
1·~U¥Q·a.~Jg~_ t~r;nperan~r~:employ~d? ·
(A) ; :~·~:··~:h-~teii~r'·s··~rinciple does not
...>....:·;'i. ~·=· . :. f:tpplyJq:Ul~:4t~u~trial manufacture
·._ = : . : ·. ·1·- · .- qfaqm.t~:m~-~.-.:
.=: ...(B) -· :,·rh~ ~~-a~tio_n j~ ~_11dothermic.
. _ ·.:.· ..(C) ,,. >A.hi.gh,t~roper3:ture drives the -
eqU,j_ljqrjymf9rward. ... ,.,.
tPJ .· ;. ,:Tl)~::-.:~eac.tion .--rate at lo.~er
_· --~ ;; .:_: _;-...:.- ·_. ·_.t~rpp~ra~~re~ would be too-slow.
. ...
-..
. .
34. .- ~In the-~anufac~~i:'e ofchlorine by ei~ctrolysis ofbrine; the ionic ~quations . ·
·:. for:fue·:pioce~s·es.·o~c.uring at the cathode and anode are . .
,·:- :.·.. : J • ~- .•=
Cathode Anode
_(!~ ~Cr(aq) .7Ch(g) + 2e- ·· .. · --~Na+(aq) .+.2e·-~-2Na(l)
(B) · 2~a~(a~)-; 2e· ~ 2Na:<_i_).'·· - :_._"_·. --~-~-r~<~g).-~ Gh(~) +~~-.:
.(C) . ' ·2Na~(l) +.:2e- ~ 2Na(l) · iCr (1}_-4' Cli(g)'+ 2C?- .
. . ~ .. . .
.:-_(I?).,_..... _.-:Na~~j~:1e- ~ Na(l) c~-(~q~ :-7 ~l(g) ~ e~.
Which ofthe following is NOT a cpmmerciaJ
methodof~lcqhol P~C?Q~~~jon? _.:
. . ..····: .. · ··. .
-(A) .-~nai-~o~i~-~~~p~~~tion_ ·.:-·~: ~
(B) Aerq~i-~ ~~~P!r~~~9~ ··
(C) Hydration ·
(D) Fermentation
Which ofthe following are important uses of
sulphur dioxide and its compounds?
I. Restricting the growth ofmould
11. Inhibiting the oxidation offood
III. The Contact Process
(A) I and 11 only
(B) I and 111 only
(C) II and III only
(D) I, II and III
----_,_
. ; ,4JOZ~·
37. Dis~ol~e~_Q~yg~n in :~at~r is important to
aquatic iife.. Wh~ch ofthe following fact?rs
decrease the conct?ntrati~n of oxygen in ·
.. :··:
. . .
I..·.; ·.:...:Dec~y ;of o'~g~~ic materiais
. II. Turbulep<;e. ofthe.water
.·~i1f ~~_-' _pl);tps~tpesi~-: · ·_ ·
-· ..IV.:.. ·.J{espiratiqn,
'..;·.· .(~)
(B)
(C)
.(D)
I_ aDd Ill,
.I and IV
II and III
II and IV
......_
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-..m ij .s::.

10. 38.
39.
40.
• _.. . • l
. - 10.:
Catalytic·converters are-now w'idely used to
reduce emissionsofoxides ofnitrogen, carbon
monoxide and hydrocarbons... :. :·
Which of the following·;a:re·MOST likely ·
taking place in the converters?
I. Carbon monoxide+ hydrocarbon~
carbon dioxide and water.
II. Carbon nion·ox~ide +:·oxides: of·
ni~rogen ~ carbon iiioxide and
nitrogen gas. .
III. Oxides ofnitrogen ·are converted by
th~ action ofthe catalyst to nitrogen .
gas.
I and II only
I and Ill onty·
·4f. -:: witi<::h: ·orthe.;folibw"ing.~t~tetri·ents :·ahdtit '
··~...·-~pu'rific~tioh tif~bihe~tw '.Wat~r1
is NOT true?
(A} - Chlorine're~cu{Viith water to form
hyp<Jclilorou~~a:Jid,_HOCL
(B) A"i~btciilogerr; triciilorometha·ne can .
be .fonned..when· chl<?rine reacts
· ·-withsoil·w·ater:!:· :
(C) Very:s.lrialFartlou'nfs of chlorine can
.purifY l#ge·-~mbunts ofwater.
(0) Ozone··p-fi'fifi~s water aflhe.time of
·ti-eaimerit6nty.
42. In ~hich laye~ of the atiriosphere. is ·ozo~e
·detrimental to hl.unan·health?
(A)
(B)
(C)
(D)
II and Ill only ·:.:;: .:..:.· ....:~, ~-- :· ...: ·;~:J,·=·: ·.:... ·. :.
"(A) Stratosphere
.(B).··..:TJ;OP9~Ph~re
:-.(C)- .·-.·PhQ.tospJt¢re
I, II and III ·. .:.• r.
.·CFCs (chlorofluorocarb.ons). are being
replaced by HCFCs ~. (hy~irochloro­
fluorocarbons) in an effort to break dowrl
. less ozone.· This is because HCFCs
are lighter than CFCs.. ·
~re more polar than CFCs
. (D) · Hydrosph-ere .
·· ·Item.43.refers to the following information.
Q •• ...: . . . . . . . . . .
. .. Ammonia" is used.to minufactllre fertiiizers
.. . ·:1n~t~t~ifi~iit::nit;6·ge.rl"" is. essenlial for "th~
·. ; ·~-·· ·. :-fotm"ittiorh)fplirit'protein. ·.
{A)
. (B)
(C) break down in the troposphe·re more.· ..
readily tha.ti CFCs · . ·
4~. · ~--Wbich-{erlilizet:would _be BEST for plant
--~~".4~?:;.·..;:·:··!.·--~'~:.--:·· .
(D) are less volatile than'CFCs
. •. :·:. ··.
Which ofthe following combin~doris includes.
renewable energy alternatives· ONLY?
(A}
.{_B)
(C)
(D)
• • ••• : t ~. ;
Tidal, wind; ge?th,ermal ~d solar
Wind, coal, riuCieat and gl6thermal
Geothermal, hydroelectric,.tidal and
gasohol
Wood, petrc;>l, peat.and m~~hane
(A)
. (B)
(C)
(D)
' =::.
Arn~orliun{l-Htr-ate,'NH4N03•
Urea~ .(i-·r~~)2CO. ·.
·.-. ·Ahirlioniuiri..'J~tiqsphate,:.(NH4)3PO
Potassr~~~~~~~tt~J:~KNo~·('·
3
. . ....~ .
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11. - 11 -
' •• , . · " . , !
.... ".
• I 44. Which of ~he fo11owing represent
greenhouse effect caused··by- g~~e~ su
. 45. Which of the following is NOT involved in.
the formation ofphotochemical smog?
Ir
i
I
I
I
I
·i·
I
·I.
!!
-~..........· -·:: . wti ~ ..;.
- ·=*~ ....:. ~
as
C02
in the atmosphere~ · .
(A) Su1phurdioxide
(A) Promotion ~f photpdi~spci (.B).· Ozone
reactions · . (C) Oxygen
(B) Absorption ofinfrared radiation ·.··
(C) Free radic~l fonitation . .
.(D) Nitrogendioxide
.•
(D) ~bsorption ofultra':'oiletradia~i
IFYOUFINISHBEFORETIMEISC LED,CHECKYOURWORKONTHISTEST.
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