'' Trich de thi tuyen sinh Dai hoc khoi B nam 2009''
Cflu 24. Mpt hon hdp gom axetilen, propilen va metan. Dot 11 gam hon hdp thu diTdc 12,6 gam niTdc. 11,2 lit hon hdp (dktc) phan iJng vufa du vdi mpt lifdng dung
dich chiJa 100 gam brom. Vay thanh phan phan trSm the tich cic chat axetilen,
propilen v^ metan trong hon hdp ban dau 1^: , » ^^^y ,
Ạ 50%, 25% va 25% B. 25%, 25% v^ 50% , ,
55%, 25% \h 20% ,^ '^MM ^- va 30% l-. fl
Eu 25. Trong mpt binh kin chtjfa hSn hdp khi gom hidrocacbon A va kM hidro c6 xiic tic, thu dUOc mpt khi B duy nhát. 6 cting nhi^t dp, dp suat trong binh tnrdc khi nung ndng
gap 3 Ian ip suat sau khi nung ndng. E)ot chdy mpt li/dng B thu dUOc 8,8 g CO2 va 5,4 g H2Ọ C6ng thijfc phan tuf cua A li:
A. C 2 H 4 B. C 2 H 2 C. C 3 H 4 D. C 4 H 4 Cflu 26. Dot chiy hoan tôn 2 lit hon hdp gom axetilen v^ mpt hidrocacbon A, thu Cflu 26. Dot chiy hoan tôn 2 lit hon hdp gom axetilen v^ mpt hidrocacbon A, thu di/dc 4 lit CO2 va 4 lit hdi nuTdc (cic the Úch do cl ciing nhipt dp va i p susft). VSy A va % ciaa nd trong hon hdp l a :
ẠCH4va40% , ,^ B.C2H6va50% V
c . C 2 H 6 va 60% "'''"^ "' ; D : C j H g va 50% ''
Phan dgng va phuong ph^ip giai H6a hgc 11 HQu c O - B6 Xufln Hiing
c a u 27. Cho hidrocacbon X phan iJng v d i brom (trong dung dich) theo t i I f m o l 1 : 1, thu diTdc chat hiJu cd Y (chiJa 74,08% Br khoi liTdng). K h i X phan iJng v d i HBr thl thu dOOc hai san pham hvtu cd khdc nhaụ T en g o i cua X la ^ / Ạ b u t - l - e n B . but-2-en C. propilen D . Xiclopropan
" Trich de thi tuyen sink Dai hoc khoi B ndm 2009''
C S u 28. Hon hdp k h i X gom Hz va C 2 H 4 c6 ti k h o i so v d i He m 3,75. Dan X qua N i nung nong, thu diTdc hSn hqJp k h i Y c6 ti khoi so v d i He la 5. H i ? u suat ciia phan
iJng hidro hoa la rv-^M';*! X] , r ' : ) l / i ' i A
A . 25% B . 2 0 % ' C . 5 0 % ^ D . 4 0 %
\Z'^Z,> .!) " Trich de thi tuyin sinh Cao ding ndm 2009"
C a u 2 9 . Dun ndrig h6n hdp k h i X gom 0,02 m o l C 2 H 2 v^ 0,03 mol H 2 trong mpt binh k i n (xdc tdc N i ) , thu diTdc hon hdp k h i Y . Cho Y 10i tCf tilf vao bmh nifdc brom (diT), sau k h i ket thuc cdc phan tJng, khoi liTdng blnh tSng m gam va cd 280 m l hon hdp k h i Z (dktc) t h o i t rạ T i khoi cua Z so v d i H 2 m 10,08. Gia tri c i i a m l a ,:.,;,•„,.;<>:,..,/ i;/-fr\J.¥',::'f%i,
Ạ 0,328. B . 0,205. C. 0,585. D . 0,620.
" Trich de thi tuyen sinh Dai hoc khoi A nam 2010''
c a u 3 0 . H o n hdp k h i X g 6 m dimetylamin va hai hidrocacbon dong ding lien tiep. D ^ t chdy hôn toan 100 m l hon hdp X bkng mOt liTdng o x i viTa du, thu diTdc 550 m l hon hdp Y gom k h i va hdi niTdc. Neu cho Y d i qua dung dich axit
sunfuric dSc (diT) thl c6n lai 250 m l k h i (cdc the tich k h i va hdi do d cilng dieu
k i ^ n ) . Cong thiJc phan tuf cua hai hidrocacbon Ik
„ „ ^ ^ -lori loM J i' i • Ạ C 2 H 6 va CjHx. B . C 3 H 6 v£l C 4 H 8 . '
",'nri «i¥»;»"( •!•)' ';. f . i f f I,
C.CH4vaC2H6. D . C 2 H 4 va C 3 H 6 . "
" Trich di thi tuyen sinh Dai hoc khoi A ndm 2010"
c a u 31. Cho hon hdp X gom C H 4 , C 2 H 4 v^ C 2 H 2 . L a y 8,6 gam X tdc dung h^t vdi dung dich brom (diT) t h l khoi liTdng brom phan tfng Ik 48 gam. M $ t kh^c, n^u cho
13,44 lit (d dktc) h5n hdp k h i X tic dung vdi lUqJng diT dung dich AgNOs trong
N H 3, thu diTdc 36 gam ket tuạ Phan trim the tich cQa C H 4 cd trong X Ik
Ạ 40% B . 2 0 % C. 2 5 % D . 50%
^.Ssa '• Trich de thi tuyen sinh Dgi hoc khoi B ndm 2009"
v . . .•'yirs.ti .-'.-/^ H l / d N G D A N G I A I . 3 , ,
c a u 1. K h ^ i lifdng ciia nifdc hkng kh^i lifdng cua hidrocacbon dem d^t, neu goi y la
s6 nguyen tit cacbon, ta c6 1 8 . ^ = M . chi cd gid tq y = 6 thl M = 54 ( C 4 H 6 ) la phfi hdp.
V ^ y c h p n C . , ' ' ^ • .^'ip-
^au 2. Dieu kien de mpt chat hffu cd cd dong phan hinh hoc (cis-trans): ^ _ ^ fPhan tuf H C H C phai cd noi doi : C = C b \ l v a a ? i b ; c ^ d
Hirdng dSn giai chi tiét
Chi cd C H 2 = C H - C H = C H - C H 2 - C H 3 cd dong phan hlnh hoc => D a p an C . c a u 3.