Thi online - Mt s vn m u v ha hc hu c - 1Cu 1 [2051]nh nghanodi y ng?

A.Nhng hp cht c cng phn t khi nhng c cu to ho hc khc nhau gi l nhng cht ng phn.

B.Nhng hp cht c cng cng thc phn t nhng c cu to ho hc khc nhau gi l nhng cht ng phn.

C.Nhng hp cht c cng cng thc tng qut nhng c cu to ho hc khc nhau gi l nhng cht ng phn.

D.Nhng hp cht khc nhau nhng c cng cng thc phn t gi l nhng cht ng phn

Cu 2 [3975]Sp xp cc cht sau: CH4, CHCl3, CH3OH theo th t tan trong nc tng dn.

A.CH4 < CH3OH < CHCl3B.CH3OH < CH4 < CHCl3C.CH4 < CHCl3 < CH3OHD.CHCl3 < CH4 < CH3OH

Cu 3 [21942]Cng thc tng qut ca cc cht ng ng Naphtalen () l:

A.CnH2n16B.CnH2n14C.CnH2n12D.CnH2n10

Cu 4 [35229]iu no sau y ng khi ni v nhm nh chc:

A.L hp cht hu c c nhng tnh cht ha hc nht nhB.L nhm cc nguyn t gy ra nhng phn ng ha hc c trng cho mt loi hp cht hu c

C.L nhm nguyn t quyt nh tnh cht ha hc c trng cho mt loi hp cht hu cD.B v C ng

Cu 5 [43155]Cho isopren tc dng vi Br2 theo t l s mol l 1 1 th s sn phm ibrom ti a thu c l:

A.2B.3C.5D.4

Cu 6 [44644]Hirat ha 2 anken ch to thnh 2 ancol (ru). Hai anken l

A.2-metylpropen v but-1-en (hoc buten-1).B.propen v but-2-en (hoc buten-2).

C.eten v but-2-en (hoc buten-2).D.eten v but-1-en (hoc buten-1)

Cu 7 [59164]Khi 1,00 gam metan chy ta ra 55,6 kJ. Cn t bao nhiu lt kh metan (ktc) lng nhit sinh ra un 1,00 lt nc (D = 1,00 g/cm3) t 25,00C ln 100,00C. Bit rng mun nng 1,00 gam nc ln 1,00C cn tiu tn 4,18 J v gi s nhit sinh ra ch dng lm tng nhit ca nc.

A.8,2 ltB.8,1 ltC.8,0 ltD.7,9 lt

Cu 8 [67933]Cho hn hp cha ng thi cc cht kh: CO2, C2H4, xiclopropan, propan. Thuc th no sau y cho bit s c mt ca etilen?

A.dung dch Br2B.kh H2C.dung dch KMnO4D.kh O2

Cu 9 [71544]Mt hp cht hu c X c cng thc C4H9Cl. Kt lun no sau y v X ng?

A.1 lin kt i, 5 ng phnB.Khng c lin kt i, 8 ng phn

C.2 lin kt i, 4 ng phnD.Khng c lin kt i, 4 ng phn

Cu 10 [71605]Cng thc tng qut ca hirocacbon X bt k c dng CnH2n+2-2k (vi n nguyn, k 0). Kt lun no sau y lun ng?

A.k = 0 th cng thc ca X l CnH2n+2 (n 1). X l ankan

B.k = 1 th cng thc ca X l CnH2n (n 2). X l anken

C.k = 2 th cng thc ca X l CnH2n-2 (n 2). X ln ankin hoc ankaien

D.k = 4 th cng thc ca X l CnH2n-6 (n 6). X l aren

Cu 11 [71633]Hin tng g xy ra khi un nng toluen vi dung dch thuc tm?

A.dung dch thuc tm b mt mu v c kt ta enB.c kt ta trng

C.c si bt khD.thuc tm mt mu v c kt ta trng

Cu 12 [79543]Trong phng th nghim axetilen c th iu ch bng cch

A.cho nhm cacbua tc dng vi nc.B.un nng natri axetat vi vi ti xt.

C.cho canxi cacbua tc dng vi nc.D.Kh nc ca ru etylic

Cu 13 [105285]Cho cng thc cu to ca hirocacbon:

Tn gi ca hirocacbon trn l

A.6-etyl-6-metylhept-3-in.B.2-etyl-2-metylhept-4-inC.6,6-imetyloct-3-in.D.3,3-imetyloct-5-in.

Cu 14 [105287]Khng nh no sau y l ng ?

A.Gc cacbo t do c to thnh trong s phn ct lin kt cng ho tr theo kiu d li.

B.Gc cacbo t do c to thnh trong s phn ct lin kt cng ho tr theo kiu ng li.

C.Cation m in tch dng nguyn t hiro c gi l cacbocation.

D.Cabocation c to thnh trong s phn ct lin kt cng ho tr theo kiu ng li.

Cu 15 [105288]Trong cc c tnh sau c tnh no khng ng i vi gc cacbo t do v cacbocation?

A.Rt khng bn.B.Kh nng phn ng cao.C.Thi gian tn ti ngn.D.C th tch bit v c lp c.

Cu 16 [105289]Hp cht (CH3)2C=CH-C(CH3)2-CH=CH-Br c danh php IUPAC l

A.1-brom-3,5-trimetylhexa-1,4-ien.B.3,3,5-trimetylhexa-1,4-ien-1-brom.C.2,4,4-trimetylhexa-2,5-ien-6-brom.D.1-brom-3,3,5-trimetylhexa-1,4-ien.

Cu 17 [105294]Phn ng gia C2H5OH (etanol) vi Na l do nguyn t hoc nhm nguyn t no gy nn ?

A.CH2OH.B.CH3.C.OH.D.H.

Cu 18 [105295]Phn ng gia CH3CH=CHCH3 vi nc Br2 l do nguyn t hoc nhm nguyn t no gy nn ?

A.CH3CH.B.CH3.C.CH.D.CH=CH.

Cu 19 [105296]Cho ba hp cht hu c sau: CH3CH2Br ; CH3CO-O-CH3 v CH3CH2OH. Tn gi ca ba hp cht ny theo danh php gc chc ln lt l

A.etyl bromua, metyl axetat v etanol.B.etyl bromua, metyl axetat v ancol etylic.

C.etan bromua, metyl axetat v ancol etylic.D.brometan, metyl axetat v ancol etylic.

Cu 20 [105297]Cho hn hp hai cht l etanol (ts = 78,3oC) v axit axetic (ts = 118oC). tch ring tng cht, ngi ta s dng phng php no sau y:

A.Chit.B.Chng ct thng.C.Lc v kt tinh li.D.Chng ct p sut thp.

Cu 21 [105300]Thuc tnh no sau y khng phi l ca cc hp cht hu c ?

A.Khng bn nhit cao.

B.Kh nng phn ng ho hc chm, theo nhiu hng khc nhau.

C.Lin kt ho hc trong hp cht hu c thng l lin kt ion.

D.D bay hi v d chy hn hp cht v c.

Cu 22 [105302] tch actemisin, mt cht c trong cy thanh hao hoa vng ch thuc chng st rt, ngi ta lm nh sau: ngm l v thn cy thanh hao hoa vng bm nh trong n-hexan. Tch phn cht lng, un v ngng t thu hi n-hexan. Phn cn li l cht lng st c cho qua ct sc k v cho cc dung mi thch hp chy qua thu tng thnh phn ca tinh du. K thut no sau y khng c s dng?

A.Chng ct.B.Chng ct li cun hi nc.

C.Chit.D.Kt tinh li.

Cu 23 [105303]Du m l mt hn hp nhiu hirocacbon. c cc sn phm nh xng, du ho, mazut... trong nh my lc du s dng phng php tch no ?

A.Chng ct thng.B.Chng ct phn on.

C.Chng ct p sut thp.D.Chng ct li cun hi nc.

Cu 24 [105304]Licopen, cht mu trong qu c chua chn (C40H56) ch cha lin kt i v lin kt n trong phn t. Khi hiro ho hon ton liopen cho hirocacbon no (C40H82). Hy xc nh s ni i trong phn t licopen:

A.10B.11C.12D.13

p n1.D2.C3.C4.D5.D6.C7.D8.C9.D10.A

11.A12.C13.C14.B15.D16.D17.C18.D19.B20.B

21.C22.B23.B24.D