Ạ 1,2. B. 2,0. C. 1,5. D. 1,8.
19.24. Hoa tan hoan toan m gam ZnS04 vao nirdrc dugc dung djch X. Néu cho
110 ml dung djch KOH 2M vao X thi thu dugc 3a gam ket tiiạ Mat khac, néu cho 140 ml dung djch KOH 2M vao X thi thu dugc 2a gam ket tiiạ néu cho 140 ml dung djch KOH 2M vao X thi thu dugc 2a gam ket tiiạ
Gia trj cua m la
Ạ 32,20. B. 24,15. C. 17,71. D. 16,10.
19.25. Trong phan ung: Y^^Cx^Ô + HCl -> CrCl3 + CI2 + KCI + H2O
So phan tijf HCl dong vai tro chát khir bang k Mn tong .s6' phan tijr HCl tham gia phan ling. Gia trj ciia k la
Ạ 4/7. B. 3/7. C. 3/14. D. 1/7.
19.26. H6n hop X gom CuO va Fe203. Hoa tan hôn loan 44 gam X bang dung
djch HCl (du), sau phan ung thu dugc dung djch chira 85,25 gam mu6'ị Mat khac, néu khu hoan toan 22 gam X bang CO (du), cho h6n hgp klii thu dugc sau phan ung I6i tit tu qua dung djch BăOH)2 (du) thi thu dugc
m gam kC't tiiạ Gia trj cua m la
Ạ 76,755. B. 73,875. C. 147,750. D. 78,875.
19.27. H6n hap b6t X g6m Cu, Zn. D6't chay hoan loan m gam X trong oxi (du), thu dugc 40,3 gam h6n hop gom CuO va ZnỌ Mat khac, neu cho (du), thu dugc 40,3 gam h6n hop gom CuO va ZnỌ Mat khac, neu cho 0,25 mol X phan img vdi m6t lucmg du dung dich K O H loang nong, thi thu dugc 3,36 lit khi H2 (dktc). Phdn tram kh6'i lugng ciia Cu trong X la Ạ 19,81%. B. 29,72%.
C. 39,63%. D. 59,44%.
19.28. Chat ran X phan umg vdi dung dich HCl dugc dung dich Y . Cho tir tir dung dich N H , den du vao dung dich Y, ban d^u xuát hien kS't tiia xanh dung dich N H , den du vao dung dich Y, ban d^u xuát hien kS't tiia xanh sau do k6't tiia tan, thu dugc dung dich mau xanh thSm. Chat X la
Ạ CuỌ B. Fẹ C. FeỌ D. Cụ
19.29. San phdm cua phan ung nhiet phan hoan toan AgNO, la Ạ A g , NO2, O2. B. AgjO, NO, O2. Ạ A g , NO2, O2. B. AgjO, NO, O2.
C. A g , NO, O2. D. AgjO, NO2, O j .
19.30. Phat bieu nao sau day khong dung?
Ạ Ancol etylic bd'c chay khi tiep xiic vdi CrO,.
•B. K h i phan umg vori dung dich HCl, kim loai Cr hi oxi hoa thanh ion Cr^*. C. Crom(VI) oxit la oxit bazạ
D. Croni(III) oxit va crom(lll) hidroxit dSu la chát c6 tinh lircrng tinh. 20. PHAN BIET CHAT V 6 CO, HOA HOC V A V A N D E PHAT TRIEN
K I N H TE, X A H O I , M O I T R U O N G
20.1. Cac khi c6 the cCing tdn tai trong mot h6n hgp la
Ạ NH3 va HCl. B. H2S va C I 2 .
C. CI2 va O2 . D. H I va O3.
20.2. T i le s6' nguori chdt v^ btnh ph6i do hiit thu6'c la gap hang chuc iSn so ngudi kh6ng hiit thu6'c lạ Chat gay nghien va gay ung thu c6 trong thu6'c ngudi kh6ng hiit thu6'c lạ Chat gay nghien va gay ung thu c6 trong thu6'c la la
Ạ aspirin. B. moocphin. C. nicotin. D. cafcin.
20.3. Di nhan biét 3 axit dac, ngu6i : HCl, H2SO4, HNO3 dung rieng biet trong 3 Ig hi mat nhan, ta dung thu6'c thic la trong 3 Ig hi mat nhan, ta dung thu6'c thic la
Ạ Fe B. CuO C. A l D. Cu
20.4. Cho cac chat : HCN. H j , dung djch KMnỘ dung djch Br,. S6' chat phan irng dugc vol (CH,)2CO la irng dugc vol (CH,)2CO la (adsbygoogle = window.adsbygoogle || []).push({});
Ạ 2 B. 4 C. 1 D. 3
20.5. Tac nhan chu yeu gay mua axit la
Ạ SO2 va N O 2. B. CH4 va NH3.
C. CO va C M 4. D. CO va CO2 .
20.6. Hai thiiy ngan rat doc, bcKi vay khi lam va nhiet ke thiiy ngan thi chat b6t dugc diing de rac len thiiy ngan l o i gom lai la dugc diing de rac len thiiy ngan l o i gom lai la
Ạ voi song. B. cat. C. muoi an. D. luu huynh.
20.7. Co nam dung djch dung rieng biet trong nam ong nghiem: (NH4)2S04,
FeCl,, C r ( N O , ) „ K2CO,, A l ( N O , ) , . Cho dung djch BăOH)2 den du vao nam dung dich tren. Sau khi phan itng két thiic, s6' ong nghiem c6 ket tiia la
Ạ 3 B. .5
C. 2 D . 4
20.8. Cho day chuyen hoa sau:
Phenol > Phenyl axetat ^NaOíoiu) ^ j ^ ^ ^ ^
Hai chat X , Y trong sa do tren Mn lucrt la
Ạ anhidrit axetic, phenol. B. axit axetic. phenol.
C. anhidrit axetic, natri phenolat. D. axit axetic, natri phenolat.
20.9. Day gom cac chat vii thuoc deu c6 the gay nghien cho con ngudi la Ạ ampixilin, erythromixin, cafein. Ạ ampixilin, erythromixin, cafein.
B. penixilin, panadol, cocain. C. cocain, seduxen, cafein. D. heroin, seduxen, erythromixin.
20.10. Phtil bieu nao sau day la diing?
Ạ Benzen lam mat mau nucrc brom a nhiet d6 thuong.
B. Anilin tac dung vai axit nitrakhi dun nong, thu dugc mudi diazonị C. Cac ancol da chírc deu phan umg vai Cu (0H)2 tao dung dich mau xanh lam. D. Etylamin phan ung vdi axit nitra d nhiet do thudng, sinh ra bgt khị
20.11. Chat dugc diing de tay trdng giay va bgt giay trong cdng nghiep la
Ạ CỌ. B. N2Ọ
C. NO2. D. SO2.
20.12. Trong s6' cac nguon nang lugng: (1) thuy difin, (2) gio, (3) mat trcri, (4) hoa thach; nhung ngu6n nSng lucmg sach la (4) hoa thach; nhung ngu6n nSng lucmg sach la
Ạ(l),(3),(4). B. (2), (3), (4).
C.(I),(2),(4). D. (I), (2), (3).
20.13. Cho m6t so nhan dinh ve nguyen nhan gay 6 nhifim m6i trucmg khong
khi nhu sau:
(1) Do hoat dong cua nui lirạ
(2) Do khi thai c6ng nghiSp, khi thai sinh hoat. (3) Do khi thai tir cac phuorng tifin giao th6ng. (adsbygoogle = window.adsbygoogle || []).push({});
(4) Do khi sinh ra tCr qua trinh quang hop cua cay xanh.
(5) Do n6ng d6 cao cia cac ion kim loai: Pb^*, Hg^^, Mn^*, Cu^* trong cac
ngu6n nuorc.
Nhung nhan dinh diing la
Ạ(l),(2),(3). B. (2), (3), (5).
C.(l),(2),(4). D. (2), (3), (4).
20.14. Di danh gia sir 6 nhiSm kim loai nang trong nude thai cua m6t nha may,
nguoi ta láy mot it nude, c6 dac r6i thfim dung dich Na2S vao thSfy xua't hifin
ket tua mau vang. Hien tuong tren chiing to nude thai bi 6 nhifim bcri ion
Ạ Fé^ B. Cú\
C . P b ^ D . C d ^
20.15. Thu6'c thijr dung d^ phan biet dung dich NH4NO3 vdi dung dich
(NH4)2S04 la
Ạ d6ng(ll) oxit va dung dich HCl.
B. kim loai Cu va dung djch HCl. C. dung djch NaOH va dung dich HCl.