C6 candring dich sau phan ri'ng thu dugc m gam m,riii klian.. ng chAt t4o trtLc ti6p ra andehit axetic bing 1 phin ilng ld cau n ilir,6n to',g ho.p 60kg thuj,tinh hfl'u co plexiglat thi
Trang 1rRiicvNc DAr HQC Kl-lrN
Trwong THPT Chuy6n KHTN
BAt K|EM TRA KIEN THOC M6N HOA HQC LO',P 12 - 49ffi
Thdi gian ldm bdi: 90 phfit - Ngdy thi: 16-01-2011
Ma dC thi:274
IIg vi tdn hgc sinh: : ' ,.' ' '.'
C6,; 1: Hod tan hoirn todn 4,Z gamNazCO: uao n.tO'" thu duo c dung dfch X Cho tt ti' di5n hi5t tr:'ng gigt 20gam
dLrng dlch HCI n6ng dO g,125o/o vdo X vd khu6y d€u Th€ tich khi COz thu dugc d dktc ld
-
a, o,zzqft -
ciu 2: Hod tan 4 gam h5n h-op 96; F; vd kim loai M (hod tri II, &img trudc hidro trong ddy dian hoci) bing
dLrng dich HCI du thu duo c z,Z4 litkhi H2 d dktc tufAt dta" Ae noa tan 2,4 gam kim loai M cAn phAi dtrng chu'a
difn 250m1 dung dich HCl 1M Kim lopi M dd cho ld
Ce,, ;r N;lng b6n thagh sdt rgryer-"frat vdo b6n dung dich sau: CuQ''lO3)2, FeCl3, CuSO++HzSO4' Pb(NO3)2' So trurdng ho-p xuAt hiQn sg dn mdn dign ho6 ld
cau +' Hod tu,.r het 46,4 gam h5n ho p g6m Feo, Fe2O3, Fe:O+ bing dung dich HNol dflc n6ng thu duo.'c 2,24 lit
khi NOz (dktc) C6 candring dich sau phan ri'ng thu dugc m gam m,riii klian Gi6 tri cria rn lh
A 84,7 garn B.l45i gam C'36,3 gam' D' 96'8 gam'
CAu 5: Cho cdc phAn ilng :
1)SO2+HrS i2)NazSzO:+HzSO+ +3)fil+FeClr +
' +i rirs + clz
5 5) Hzoz + KNo2 -+ 6) o, + Ag ->
-I Sd phnn il'ng tao ra do-n cnAt te
ca, lr-iiro c6c ch6t: CzHt, CzHt,C2H5oH, CH3COOCH:CHz,CH':gg-HzCI, CH:-CHC12 So luo ng chAt t4o trtLc ti6p ra andehit axetic bing 1 phin ilng ld
cau n ilir,6n to',g ho.p 60kg thuj,tinh hfl'u co (plexiglat) thi kh0i luo.ng axit vd ancol phai dilng lAn irrqt la (Bi6t
hiQu sLr6t qu6 trinh est hna ue qua trinh trirng ho p lAn luqt ld'60% vd 80%)
A 32,5kg vd 20kg n ss,st g va +rtg c 85kg vi.40kg D 107,5kg vi 40kg'
.Ca" ;, cni" riO" rrqp'Ei* nui u"i.riit i", don cf,irc ldm hai phin.b-ing nhau Pharr 1 dem ddt
lnav f olltoan th,
duo c l,0ggam nu6.c p"hAn 2 t6c dgng vdi Hz du Q.{i, f) thu duo c hdn ho p X Eem d6t ch6y hodn todrr h6n ho p X thi thLr duo c th6 ticir COz 6'dktc le
CAu 9: gui JAt X, y la d6ng phAn cria nhau, dAu c6 chri'a vdng benzen vd c6 c6ng thri'c ph6n tir ld C7H3o Ce X,
t d6;;r;;u,u
"rixa jiai piong Hz.J krl9ng-t6? 9rul,s v6i dung dfch Br2 X phin tmg v6i nu6'c brom theo t! 16
mol I : 3 tao k6t tira Xr (CfHsOBr:)' C6c chAt X vd Y l6n luqt ld
A m - crezol vd metyl phenyl ete B' m - crezol vd ancol benzylic'
C p - crezol vi ancol benzyiic D o - crezol vdL ancol benzylic'
ca" ro,"ooi.r*v r-,oan toin 0,01n.rol rnQt ancol no m4ch h6'Y cAn 0,025mo1 oz N6u oxi ho6 0,02mol Y thd'h a'dehit (h:100%), rai
"f- ia" iirng h6t v6'i dung dich AgNO3A{H: du thi s6 gatn bac thu dr.ro.'c
ld
c6u 11: Ctro c6c chat:Na:poq;NaHzPb:;NazHPO+;NaHzPO+; NaHS;NazS;NaCl;NaHSO+;NazHPO:;NazSOq; NaHCos; Na2Co3 So ch6t phin irng duo c v6i cA dung dich NaoH vi dung dich HCI ln
-
C6tr 12: Ctto Z4gam Cu vdo 400m1 dung dich NaNOg 0,5M; sau d6 th6m ti6p 500m1 dung dich HCI 2M d6n khi phirn iL'g x6y ra hodn todn thu dugc dung dich X vd v1 lit khi khongpiu g dktc Mat kh6c thdrn dung dich NaoH
iil'1";5,,1:'| fOt ir" r,Zi;Ffi;;ti1?r' aung dich NaoH 0,sM;oi thi6u dd dirng li v2 iit Gi6 tri v1 vh v2 lA' Iuot lri
A 4,48litvd 1,2iit B 5,6lit vi 1,2lit c 4,48lit vd 1,6lit D 5,61it vd 1,61it'
CAu 13: Cho c6c nAi, u*"tit.n, vinylaxetiien, phenylaxetilen, andehit fomic, axit fomic, glucozo, r'ratri fomiat'
Sd chAt khir duo-c Ag* trong [AgOtHr)z]OH la
""
; i "nit 8.6 chat c.4 chAt' D' 5 chat
c6u 14: NhiQt plidn hodn fodLn 0,05 mol 1.c9, trong binh Ih "Jt!3!f 1 To] 9, thu duo c ch6t rin x' Do hod tan
hoAl todn chat 161 X bing dgng dich HzSO+ d{c, n6ng thi s6 mol HzSOq t6i thi6u cAn di:ng ld
CAu 15: Cho tiL tir du'g ai"fr i t"frt u #, Cr, SOll vdo dung dich Y (chila Na*, COI-, OH )' So phan img t6i
da c6 th6 xiy ra d4ng ion tliu ggn ld
cau ia, Hop chAt X c6 c6ng thric phan tir C3H5ch Thriy phan hodn toin X thu duo;c chAt Y' Biot ring Y t6c
drrrrs duoc v6'i Na si6i ph6n;Hr vi Y c6 phin img tr6ng gu'.tng C6ng thilc c6u t4o cria X ld
Trang 2cAu l?: D6t chey h6t m6t lugng ch6t hfiu co X thu duoc 3,36lit khi cc2; 0,56lit khi N2 (c6c khi do d dktc) vd 3,159 H2C Khi X t6c dr.rng vdi dung dich NaCH thu duoc sin phAin c6 mu5i'rIrN-CHz-COoNa C6ng thtc c'Au tao thLr
ggn cira X ld
A H2N-CH2COO-C3H7 B H2N-CH2COO-CH3 C H2N-CH2-CH2COOH D H2N-CH2COO-C2H5 CAu 18: Hop ch6t X ld mQt g-amino axit trong phAn tri' chi chila mQt nh6m -NHz vd m6t nli6rn -COO n LaV 4,12gam X cho ph6n ring vila dti v6i dung dich NaOH tgo ra 5 gam mu6i C6ng thrlc cira X ld
A CH3CHOIH2)CHzCOOH B H2NCH2COOH
C CHjCHO{H2)COOH D CH3CH2CH(NH2)COOH.
Cdu,19:
,"5tt tlnt M g6m 2 este don chf'c mach hd X vi Y h<m k6m nhau mQt nh6m CHz tro.g ph6n trj' Cho 6,7 garn h6n ho.p M t6c dpng vil'a dri v6i 100m1 dung dich NaOH lM thu cluo c h5n hqp 2 mu6i C6ng-tir['c cria X, y ld
C CH3COOCH:CH2 vd HCOOCH:CHr D HCOOCH3 vd CH3COOCH3
CAu 20: Cho t6t.cA c6c ddng phAn m4ch ho, c6 cing c6ng th6'c phdn ti CrfLCj, lAn luqt t6c dgng v6.i: Na, NaOH, NaHCO3 56 phdn ring x6y rali
93t 11., C]t":i: dung dfch HCl, HNO3, NaOH,.AgNO3, NaNO3 Nilu chi dugc dirng th6m thu6c thfr duy nhAt tA
d6ng kim lo4i thi c6 th6 nhdn biSt duoc bao nhi€u dung dich trong s6 c6c dung dich d:a cho d tr6n?
A'
A NaHSOa;NaHCO3; NaHS; Na2S.
C NHaCI; G',lH+)zSO+; CuClz; KHSO4
B NFI4NO3; Mg(NO:)z; Na2SOa; K2SO3
D CH3COOK; CoHsCOOK; KzS; KCl
CAu 22: Tr6n 0,54 gam bQt Al vdi F"rO, vd CuO, rOi titin hdnh phAn ring nliiQt nh6m trong dieu ki6n kh6ng c6 khdng khf, thu duo c h6n h-op chAt .iLX Hda tan X trong dung dlcli lil{d thu <tugc 0,896 llt h5n hqp khi y ;6m
NO2 vA NO o dktc Ti kh6i ho'i cria h6n h_op Y so v6i H2 li
C6.u 23: Hod tan hodn todn h6n hqp gdm 9,75 gam Zn vd 2,7 gam Al vAo 200 ml dung dfcli chrla d6ng thd.i
HNO3 2M vA H2SO4 l,5M thu duo.'c khi NO (sAn phAm khri duy nhAt) vd dung dich X chi g6m c6c mu6i C6 c4n
dung dich X thu duo'c t<trOi:luqng mu6i khan ld
A 41,25 gam B 53,65 gam C 44,05 gam D 49,65 gam.
C6'a242 Dung dicli X chrla 0,375 mol K2CO3 vd 0,3 mol KHCO3 Thdm tri tt dung dich chria 0,525 mol HCI vdo dune dich X duo.'c dung dich Y vi V lit CO2 (dktc) Th6m dung dich nu6'c v6i trong du vdo y thAy eo thdnh m
gam k€t trla Gi6 tri cria V vA m ld
A.3,36lit;r7,5 gam B.8,4lit; 52,5 garn c.3,36lit;52,5 gam D.6,72rit;26,25 gam.
CAu 25: Cho cAn bing sau: ?X (k) + y(k) +> ZZ (k) (AH < 0).
BiQn ph6p ndo sau day cAn ti6n hdnh d6 cdn bing dich chuyAn theo chiAu thudn?
A tdng 6p suAt chung, gi6.m to cria h0 B: giim nliiQt 40 cria hQ, giim n6ng dQ chAt x hodc y.
c dung chAt xfic tdc thich hqp D gia* 6p iu6t chung,'ia-ng nhiQt dQ.
Cdu 26: C6 bao nhiOu ph6.n ri'ng c6 th6 xAy ra gifi'a axit fomic voi tAn luqt c6c ch-6t: KoH, NH3, Cao, Mg, Cu,
Na2CO3, Na2SOa, CH3OH, C6H5OH?
Ciu 27: Cdng thirc cria xenlulozcr trinitrat lA
A [C6H7O20{Oz):]" B [C6H7O2(ONO2)3]" C |C6H7O3(ONO2)31" D |C6H7O3G.{Oz):1".
CAu 28: MQt ho p chdt ht'u co X m4ch th-ing, c6 c6ng thfi'cphAn tri la C3Hr;O2Nr Kii cho X'ta.-aung v6.i ki6m t?o ra NH3 vd t5c dung v6i axit tao ra rnu6i amin bdc l Cdng thri'c cAu t4o thu g.on crha X ld
ci''u 29: Goi t6n hidrocacbon c6 cdng thfrc c6u tao nhu sau: cH3-cH[cH(cH3)z]-c = c-cHz-cH:.
A 2-isopropylirex-3-in 8.2,3- tlimetylhept-3-in C.5,6- ilimetylhept-3-in D 5- isopropylhex-3-in.
C6u 30: Hop chAt ir['u co X c6 c6ng thilc phdntu C5H12O khi bi o*inoe khdng hodn todn tao ra sdn phArn y c6
khi ndng_ tham gia phdn ring tr6ng guolg Sd chdt th6a m6n tinh chAt cria X li
CAu 31: Cho dung dich Ba(OFf)2 <l6n du vio dung dich X c6 chila FeClz; FeCl:; Al(t{O3)3 vd CuSOa thu duo-c k6t tira Y N:"gI trong kh6ng khidC^n khi5i luo.ng kh6ng aOi ttru dugc ch6t rhnZ 56 lugng ch6t rdn c6 trongZlit
cAu 32: Dd.y gdm cac dung dlch c6 chri'a c6c ch6t ndo dudi d6y clAu c6 gi6 tri pH < 7?
Ciu 33: Cho 9,6 garn h5n ho p kim loai Mg vd Fe vdo dung dich H2SO4.du flr6y tho6t ra 6,72lit H2 (dktc) Mdt kh6c khi cho 9,6 gam h5n ho-p tr6n vdo 500 ml dung dich AgNO3 1,5M dt5n phan irng hodn todLn thu du'gc m gam cl-rAt rdn Gi6 tri cira rn ld
Cdu 34: Cation X2* c6.t6qg s5 hat co bAn (p, n, e) bdng 80, trong d6 ti s5 hat electron ,o ubi h4t notron le 4/5 Vi
tri crla X trong b6.ng tuAn hodn ld
A chu kj,4, nh6m IIA B chu lcj'4, nh6m VIA.
Trang 3Ciu 36: Dun n6ng 7,6_gh6n ho p { g6rn C2H2, CzF{q vi H2 trong binh kin v6i xric tdc Ni thu duo c h5n hop khi Y E6t cti6y hodn todn hdn ho.p Y, ddn sAn phAm ch6y thu dugc lAn luoJ qua binh I dpng H2SOa ddc, binli 2 dirng Ca(OH)z dLL thAy kh6i luo.'ng binh 1 tang i4,4g Kh5i luo.ng binh 2 tdng 16n lA
A.35,29am B.ZZgam C.24,939am D 17,69am.
Ca.u 3.7: Dd trung lioA 8,3 gam hdn ho.p 2 axit don chilc X, X .a." dirng vira dfi 150 gam dung dich NaOH 4%. Biiit ring axit c6 kh6i luo-ng phAn tir nh6 c6 s5 mol gip2lan s6 mol cria axit c6 kh6i luo.ng phAn tir l6n iro'n.
Cdng thfrc phAn tir ciraX vd Y lAn luot lA
Cdu 42: M6t binh kin dung tich kh0ng AOi chri'a h6n hqp cirng th6 tfch khi N2 vA Hz 6 00C, l0atrn Sau klii ti6n hinh t6ng hgp NH:, dua nhiet dO binh vA 00C, 6p su6t trong binh li 9atm HiQu su6t phan ri'ng tiing hgp NH3 ld
CAu 38: M6t este c6 cdn$ ihilc phAn tft le C4H6O2, khi thuf phdn trong m6i trudmg axit thu dugc dimetyl xeton C6ng thric c6u t4o thu ggri cria este ld
A HCOOCH:CH-CH: B HCOOC(CH:):CHz C CH3COOCH:CHz D CH2:CH-COOCH3
CAu 39: OOt chay hodn todn 0,336 lit (dktc) mdt ankadien li6n hgp X sau d6 h6p thu h6t s6n phArn chriy vdo 400
rnl dturg dich Ba(OH)2 0,15M thu ctugc 8,865 gam k6t tua C6ng thri'c phAn tri cria X ld.
A.CrF{q B C+Ho C CsHg D CsHa hoic CsHs.
CAu 40: Trong mgt binh kin chri'a hoi ch6t hfr'u co X (c6 d4ng CnHznOz) mgch hd vd Oz (sd mol Oz gdp d6i s6
mol cAn cho.pl'ran ,iug chSy) & 139,9oC, 6p su6t trong binh ld 0,8atm OOt cnay hodn toAn X sau d6 dua vd rihi€t
dQ ban dAu, 6p suAt trong binh hic ndy li 0,95 atm C6ng thri'c phdn tri cria X ldL
A C2H4O2 B CH2O2 C C4H8O2 D C:HoOz.
Ciu 41: TiSn hinh diQn phAn 200m1dung dfch CuSO+ v6'i diQn cgc tro dOn khi khdi luo.ng dung dich giAm 8 gam
thi dimg lai D6n khi H2S du vdo dung dich sau diQn phdn th6y c6 4,8 gam k6t tria den Ndng dQ mol/lit cira dung dicir CUSOa ban dAu ld
i6u 35: C6 c5c thu6c thir sau: Cu, NaOH, HliO3, H2S, KI, KMnOq + HzSOa 56 thu6c tiru c6 Ure ding d€ nhan
bi6t 2 dung dich FeSOa vd Fe2(SOa)3 drmg trong i 4 *atnh6n ld
CAu 43: Cho c6c dung dibh sau: AgNO3, CuSOa FeCl2, A12(SO4)3, ZnSOa, BaQ'trO3)2, Fe(l''lO:)r Khi cho dung dich NH3 dlin du lAn lu'gt vio c6c dung dich tr6n thi sii dung dich tao tet ma ta
Cdu 44: Di6n phAn l00ml dung dlch h5n ho.p gOm HzSO+ 0,5M vd NaCl 0,5M v6'i diQn cpc tro, mdng ngdn x6p
d€n khi o'catot tho6t ra 7,I2lit khi (dktc) thi dring lei ThO tich khi (dktc) tho6t ra d anot ld
Ciu 45: Dirng 100 t6n qu{ng c6 chila 80% kh6i luqng Id Fe3Oa (cdn lai ld tap chAt tro) d0 luyQn gang (c6 95% Fe ,e kfm lwng),v6ihiQu suAt qu6 trinh liL.g3% thi kh6i lupng gang thu duo.c li
A 55,8 t6n B 60,9 tAn C 56,2 tln D 56,71 tdn
Cdu 4_6: OOt ch6y hodn todn mQt hdn ho.p X gdm hai andehit no, m4ch hd thu duo c s5 mol nu6'c bing dirng s0
mol h6n ho p X dd phAn irng Ir{[t khdc khi cho 0,25 mol h6n ho.p X tdc dpng v6'i AgNO:AtrHs du thu dugc m gam b4c Gi6 tri cira rn li
Cdv 47: Cho c6c ch6t sau: b4c a.xetilua; metan; 1,2-.dicloetan; canxi cacbua; propan; etyl clorua; metanol; etanol; nlr6m cacbua C6 bao nliidu chAt trong s6 c6c ch6t tr€n c6 th€ diCu ch6 dugc andehit axetic bing 2 philnirng li6n titip?
Ciu 48: H5n ho p 4 g6* H2, propan vd propin (propan vd propin c6 cirng st5 mol) Cho tt' ttr h6n ho p X di qLra
b6t Ni nung n6ng dtin-phAhriurg hoAn toAn thu duo c rnQt cnat nri duy nhfu Ti kh6i ho'i cria X so v6'i Hz ld
Cffu 49: Oxi 1io6 l2,Bgarn CH3OH (c6 xric t6c) thu duo.c h6n ho.p sAn phAm X gdm andehit, axit vir ancol du.
Chia h5n ho.'p X thdnh hai phAn bing nhau PhAn I cho tic dung v6'i trong dung dich AgNOTA{H: du thu duo c
64,89 bac PhAn 2 phin irngvira dri v6i 30ml dung dich KOH 2M HiQu su6t qu6 trinh oxi ho6 CH:OH ld
Cdu 50: OOt cnay hodn toirn chAt hUu ccr X thu duqc COz vi H2O c6 s6 mol b.ing nhau Mit kh6c khi thuj'pli6n
X trong m6i trudng axit dugc chAt Y (tham gia phAn tlng trSng guong) vi ch6t Z @6 s6 nguy€n ttr cacbon bing
m6t nria s6lguy6n tir cacbon trong X) ph6t bieu ndo sau daylch6ng d.*g?
,q ChAt Y tan vd han trong nu6'c B D6t ch6y h€t lmol X thu duo c 2mol CO2 vd 2rnol H2O.
C ChAt X thuQc lo4i este no, dcrn chf'c D Dun Z v6'i HzSOa cl[c 6 170"C thu dugc anken.
F{et Clro: H:l: Li :7: Be:9: C:12: N:14:O:16:Na=23: Me:24'" Al:27: S=32' Cl=35,5; K:39;
Trang 4rRqJOnG DAr FlgC KHTN
Trwdng THPT Chuydn KHTN
DAp AryrBAr KEM TRA KIEN THuc MON HoA t-tgc Lcyp 12 - 1011
Ngdy thi: 16-01-2011
Ma de thi:214
Cdu l: D.
Cdu 6: D
C6u 1i: D
CAu 16:8
Cdu 2i:B.
Cdu 26: B
CALr 31: D
CAu 36: D
CAU 4l: C.
Cdu 46:A
Me de thi: 236
CAU 1:C
CAu 6:D
Cdu i l: B
CAU 16:D
Cdu 21:D
Cdu 26:8
CAU 31: B
CAu 36: D
CAu 41: A
Ci,u 46: A
Ma da thi: 258
CAu 6:C
Cdu 11:C.
Cdu 16: C.
CAU 21: C.
CAu 26: D
CAU 31: C.
CAU 36: B
CAU 41: B
CAU 46:A
Ma de thi: 270
CAU 1:A
CAU 6: A
CAU 11: B
C6u 16:D
CALr 2l: D
CAu 26: B
CALI 31: B
CAu 36: B.
Cdu 4i: C.
CAU 46: D
CAu 2: D
Cdu 7: D
C6.u l2: C
CAu 17: C
Cdu22: C.
Cdu27: A
CAU 32: D
CAU 37: C
Cdu42:8.
Cdu 47: C
Cdu2:D
CAU 7: C.
Obu 12:C
CAU 17: B
Cdn22:C
Cdu27:8.
Cdu32:C
CAU 37: B
Cdu42:8
C6ru 47:D
CAu 2: D
CAU 7: C.
Cdu 12:A
Cdu l7:B.
Cdu22: C
Cdu27: A
Cdu 32: A
CIfu 37: C.
CFru 42:8.
Cdu47: C
CAu 2: B
Cdu 7: D
Cdu12:C
Cdu 17: B
LAU./.2:L
Ctut2'7:8
CAU 32: C.
CAU 37: D
Cdu42:D
Cdu 47: C
tr
C6u 3: A
CAu B: D
Cdu 13iB
CAu 18: A
CAU 23: B
CAU 28: C
CAu 33: D
CAU 38: A
CAU 43: C.
CAU 48: B
Cdu 3: C.
CAU 8:A.
CAu 13: D
Cdu 18: B
C6u 23: A
C6u 28: B
Cdu 33: C
CAU 38: A
CFt:43: C
CAU 48: C.
Cdu 3: D
CAU 8:D
CAU 13: B
CAu 18:D
Cdu 23: ts.
CAu 28: A
CAU 33: D
CAU 38: C.
CAu 43: A
CAU 48: C.
Cdu 3: C.
CAU 8: C.
CAu 13: C.
CAU 18:D
CAu 23: A
Cdu 28: B
Cdu 33: A
CAu 38: B
CAu 43: C.
C6u 48: A
Cdu4:C
Cdu 9: C.
Ciu 14: B
CAu 19: D
CAu24: D
Cdt29: A
CAu 34: B
CAu 39: C.
CduM: A
Cdu49: C.
CAU 4: D
CAU 9: D
Cdu 14: A
CAU 19: C.
Cdu24: C.
C6'u29: C.
CAu 34: D
CAu 39: D
Ciu 44: B
CAU 49: B
CAu 4: A
CAu 9: C
CAu 14: B
Cdu 19: D
Cdu24:8
C6.u 29: B
CAU 34: D
CAu 39: B
Cdu 44: C.
Cdu 49: D
CAU 4: B
CAu 9: B
Cdu l4: A
CAu 19: D
Cdu24: C.
CAU 29: C.
CAu 34: C.
CAu 39: C.
CAu 44: D
CAu 49: D
Cdu 5: C CAu 10:D CAu 15: D
CAu 20: C.
Cdu 25: B
CAu 30: C CAu 35: B
CAu 40: C CAu 45: D
CAu 50:B
CAu 5: D CAu 10: D C6u 15: C CAu 20: D
CAU 25: A
CAU 30: B
CAu 35: C.
Cdu 40: D
CAu 45: C.
Cdu 50: C.
CAU 5:D
CAu l0: D Cdu 15: D
CAu 20: C.
Cdu 25: B Cdu 30: C CAU 35: D
CAU 40: D Cdu 45: C CAu 50; B
CAU 5: C CAU 10: C.
Cdu 15: C CAu 20: D Cdu 25: A
CAU 30: B
CAu 35: D C6u 40: D
CAu 45: D
CAu 50: D