ngo ngqc an - classbook
TRANSCRIPT
NGO NGQC AN
- ? CAU HOI ' ' - ~ -VA BAI TAP TRAC NGHIEM
• • , HOAHOC
•
.. _.. ? " -
NHA XUAT BAN GlAD D~C VI~T NAM
{[[W+bz0FkV43GmRt7u4DpvuYxd]]}
40-20 I 0/CXB/247 - 10/GD Ma so: T8HC'7m0- DTH
Trdc nghi~m La plw:ang pluip iliem tra hie'n thU:c chinh xac, hhach quan trong thi cii, thong qua cac cau hoi ua bai tqp trdc nghi~m cac em hoc sinh c6 dip cung co' ua hhdc sau cac hie'n tluJ:c da du·c;c IU?C trong sd.ch giao ldwa. Td.c gid xin fran tr9ng giai thi ~u u6·i quy bc;w
dong nghi~p ua cac em h9c sinh quye.'n "Cau hoi va bai tqp triic nghi~m Hoa h9C 8", quye'n sach h~ tho'ng cac cau hoi ua bai t(lp theo
tung cfw·o-ng, nwc trong sd.ch g iao hhoa Hoa h9c 8 m6·i. Trang tu:ng chu:ang CaC Call hoi Ua bai t{).p du'(/C sclp xep theo cac d& 1/WC, ngoai phdn cau hoi va bai t(lp trdc nghi~m con II eu plw:ang phap gidi. Trang m6i d~ tn~/.C, cdc bai t(lp du·qc sdp xep lLI' de de'n fth6 . Ngoai cac bai t(lp c6 hu6'ng dan con c6 bai tap tit gidi nhd.m giup ccic em hoc sinh cung co' uU'ng chdc cac !ti en thU:c lf tlwyet ua tu· /wan thi f n cac ki nang phan tich d&, ren luy~n c/w cac em h9c sinh hhd nang nhq.y ben l<hi ChQ/1 cau trd lai dung trong CaC bai t(lp frclc ng"fLi ~m .
Tdc gid xin ghi nh(ln ua cdm an m9i y hie'n dong g6p ue nhU'ng thieu s6t cu.a sd.ch d e' ldti tai bdn sd.ch se du·ac hoan chinh han. M9i .v lu e'n dong g6p xin gili u~ d?a chi: Nha xuat bdn Giao due tai TP. Ho Chi Minh 231 Nguyen Van C11·, P4, Q5 - Ban bien t(lp Khoa. hoc T1.1 nhien . FJT: (08)8302103.
TAC GL.\
3
{[[W+bz0FkV43GmRt7u4DpvuYxd]]}
I. KIEN THUC CAN NH6
1. Chat- Hon hQp
2 . Nguyen tu
3 . Nguyen to hoa hoc
4. 8on chat- HQp chat
s. Phan tu
6 . Hoa tri
7 . C6ng thU'c hoa hoc
11. cAu HOI vA BAI TAP
Ill . HU6NG DAN GIAI
1v. cAu HOI vA BAI TAP TLJ GIAI
v . BAP s6 vA HU6NG DAN PHAN BAI TAP Tl) GIAI
5
Chuang 1
CHAT - NGUYEN TU - PIIAN TU
I. KIEN THUC CAN NHO
1. Chat- hc3n h<;tp
a) Clui t
- Moi cha t c6 nhung tinh chat v~t li va hoa h9C nhat dinh.
- Chat tinh khie t la t~p hqp chi gom m<)t lo~i phan tt.i.
b ) Hdn hap
Nhieu cha t tr<)n lan vao nhau g9i la hon hqp , ho~c c6 the· hieu la
t~p hqp gom nhieu lo~i pha n tt.i tr<) n lan vao nhau.
2. Nguyen hi'
a) FJjnh nghia: Nguyen tti la h~t vo cung nho va trung hoa ve di~n.
bJ Cciu true:
- Nguyen tt.i g6m hat nha n mang di~n tich duang va vo t~o bO'i nhl'i'ng electron mang di~n tich am.
- H~t nhan nguyen tu· t~o bO'i proton (p, + ) la h~t c6 di~n tich g6m 1 di~n tich nguyen to duang (+1) va natron (khong mang di$n) .
- Trong moi nguyen tti: .---------------------------~
So proton = So electron
- Electron (e, -) la h~t c6 khoi luqng b~ng ~- dvC , c6 dien tich 1840 .
la 1 di$n tich nguyen to am ( - 1) luon chuye'n d<)ng quanh h~t nhan va s<ip xep thanh tUng l6p.
- Proton va natron c6 cung khoi luqng, con electron c6 khoi lu9·ng nh be, khong dang ke·. Nen khoi luqng cua h~t nhan duqc coi la khoi luqng cua nguyen tU'.
3. Nguyen t6 hoa hQc
a) FJ?nh nghia: Nguyen to hoa h9c la t~p hqp nhung nguyen tU' cung lo~i , c6 cung so proton trong h~t nhan.
6
b J Ki hi ~u hoa h9c: Moi nguyen to du<;>c bie'u dien bkmg m<)t hay hai chu cai , (trong d6 chu cai dau viet du6i d?ng chu in hoa) bieu dien nguyen to va bie'u dien m<)t nguyen tU' cua nguyen to d6 .
4. Ddh chat va hqp chat
aJ Dan cluit la nhung chat u,w nen tli m<)t nguyen to hoa hoc.
bJ HQp cluit la nhling chat t?O nen tU' hai nguyen to hoa hQC trO' len.
5. Phan tli'
Phan tu· la h?t d?i di~n cho chat va the· hi~n day du tinh chat hoa h9c cua chat. Phan tU' c6 the' chi c6 m<)t lo?i nguyen tU' ho~c c6 the gom tli hai lo?i nguyen tLi' lien ket v6i nhau.
6. Hoa tri
Hoa tri cua nguyen to (hay nh6m nguyen tU'l la con so bie'u thi kha nang lien ket cua nguyen tli (hay nh6m nguyen tli) nay v6i m<)t so nhat dinh nguyen tU' (hay nh6m nguyen tU'J khac.
- Hoa tri cua m<)t nguyen to trong hqp chat duqc quy dtnh:
• Hoa tri cua nguyen to H bang I. Tu d6 suy ra hoa trt cua nguyen to khac .
Vi du.: Theo c6ng thuc AHv, hoa trt cua A bang y.
HCl (Cl hoa tri l) ; H20 (oxi hoa trt Il l; CH4 (cacbon hoa trt IV) .
• Hoa trt con duqc xac dtnh gian tiep qua nguyen to oxi , hoa tri cua oxi duqc xac dtnh bang Il.
Vi dt,J : Trong phan tU' BOx, hoa trt cua B bang 2y. B20 y hoa tri cua B bang y (tru cac peoxit M20 2 supeoxit M02 va H20 2 ) nhu S03 hoa trt cua S bang VI , Na20 hoa trt cua Na ba ng I , Al20 3 hoa tri cua Al bang III.
7. Cong thuc hoa hQc
- Cong thuc hoa hQC dung de bieu dien chat, gom m<)t ki hi~u hoa hQC (don chat) hay hai , ba ... kf hi~u hoa hQC (h<;Jp chat) Vel chi SO d
chan moi ki hi~u.
- Moi c6ng thuc hoa hoc chi m<)t phan tu· cua chat, cho biet so nguyen to t?O ra chat, SO nguyen tti moi nguyen to va pha n tLi khoi .
7
- L~p cong thuc hoa h9C theo hoa tri .
Tn.10"ng hqp hqp cha t c6 2 nguye n to AxBv, khi biet hoa tri cua
nguyen to A 18. a , cua B Ia b.
Ta dl,la vao quy d e hoa t ri d~t da ng thuc : x.a = b.y
L~p ti 1$: X b (ti 1$ !?. 18. toi gian) va nham tinh theo 2 y a a
tniO" ng hqp :
( 1 ) Khi a = b thi x = y = 1
(2) Khi a 1= b va deu :2: 2 thi X = b va y = a . Neu ca hai X va y la so ch:in , ho~c c6 u6c so chung th! rut gon lay so don gia n nha t .
11. cAu H6t 'vA sAt rAP
1. Hay ll,la chQn nh$n xet nEw sau day dung?
A. Hoa hQC Ia khoa hQC nghien cuu cac chat
B. Hoa hQc nghien cuu tinh chat cac chat
C. Hoa hQc Ia khoa hQc nghien cuu cac loc;1i phEJ.n ung hoa hQC
0. Hoa hQC Ia khoa hQC nghien cuu cac chat , Sl,l bien doi va Ling dt,mg cua Chung.
2. NhCJ'ng nh$n xet nao sau day dung?
a) Chiec ban c6 tren 50% khoi Iuong Ia go thl chiec ban Ia chat, go
Ia v$t the
b) Phan lon Soong, noi , am dun deu bang nh6m thl soong , noi am dun Ia vat the , nh6m Ia chat
c) LQ cam hoa thuong lam bang thuy tinh thl IQ cam hoa Ia v$t the, thuy tinh Ia chat
d) Thit bo, thjt ga c6 chua protit thl thjt bo, thjt ga Ia chat, protit Ia v$t the .
8
e) H<;1t g<;1o, cu khoai , qua chuoi, qu~ng apatit , khi quyen , d<;ii duong
duQc gQi Ia nhQng v$-t the nhan t<;1o , con tinh bot , glucozo, duong, chat
deo Ia chat.
A. a, b , c B. c , d C . d , e D. b , c , e .
3. NhQng nh$-n xet nao sau day dung?
a) Xang , nita, muo i an , nude tlj nhien Ia hon hQp
b) so·a , khong khi , nude chanh Ia hon hQp
c) Muoi an , duong , khi cacbonic , nude cat Ia chat tinh khiet
d ) DL_1a vao slj khac nhau ve tinh chat v$-t If c6 the tach mot chat ra
khoi hon hQp.
A. a , b , c B. b, c , d C. c , d, e D. a , b, e .
4. a) Trong nhQng phuong phap sau , hay chQn m¢t phuong phap
ma em cho Ia thich hQp nhat de thu duc;Jc muoi an tU nude muoi
A. Chung cat B . Bay hoi C . LQC.
b) Chat nao sau day Ia chat tinh khiet?
I. Natri cacbonat ran
Ill . SQa tuoi
V . Thep
A. (Il l) va (VI )
C . Tat ca
II . Dung d!ch natri cacbonat
IV . Nude
VI . Thuy ngan .
B. (1) , (IV) va (VI)
D. Chi (IV ) va (VI) .
( /'rich de tl1i Hou Quai..· giu 1\ustm/iu nam 19!-J!:J i
5. Trong san xuat nong nghi$p can nhieu phan d<;im , phan d<;im
duQc dieu che tU nita cua khong khi . Trong khong khi c6 hai thanh phan
chu yeu Ia nita va oxi . Nita long soi 6 - 196°C , con oxi long soi 6 - 183°C . 8e tach hai khi ra khoi nhau , chQn phuong phap nao trong cac
phuong phap sau day:
A. 8ua nhi$t d¢ cua khong khi long den - 183°C nita long soi va
bay hoi len trudc , con oxi long den - 196°C mdi soi , tach rieng dLJQc
hai khi .
9
B. 8Ua nhiet d¢ cua kh6ng khf long den - 196°C nita long s6i va
bay hdi truck , con oxi long den - 183°C mdi s6i, tach rieng duc;c hai khf.
c. Dua nhiet d¢ khong khf long den - 196°C oxi long soi va bay len
trudc , con nitd long den - 183°C mdi soi tach rieng duc;c hai khf.
D . Tat ca deu sai .
6. C6 the dung cac CL,Jm tU nao sau day n6i ve nguyen tu:
A. Trung hoa ve dien
B. GiQ nguyen trong cac phan Ling hoa hQc
C. Tc;to ra chat
D. Khoi IUc;Jng nguyen tu thay doi.
Hay chQn CL,Jm tU thfch hc;Jp (A , B, C hay D) dien vao phan con
trong trong cau :
N . tu? I . h t • . h ? ' guyen a c;t vo cung n o ... ..... ... ...... .. va ........... .. ...... . .
7. a) Nguyen tu c6 kha nang tc;to lien ket vdi nhau nhd :
A. Electron B. Proton C. Ndtron D. Tat ca deu sai.
b) Tli tl so khoi IUc;Jng giQa cac nguyen to hidro va oxi Ia 1 : 8. Hay
tfnh til$ so nguyen tu H va 0 tc;to thanh phan tu nude.
A. 1 : 8 B. 2: 1 C . 3 : 2 D. 2 : 3.
8. M$nh de nao sau day khong dung :
A . Chi c6 hc;tt nhan nguyen tu oxi mdi c6 8 proton
B. So khoi cua nguyen tu bang so electron c¢ng vdi so ndtron
C. Proton va notron c6 cung khoi IUc;Jng
D . Khoi IUc;Jng cua hc;tt nhan ldn hdn khoi IUc;Jng cua nguyen tu.
9*. Nguyen tu cacbon c6 khoi 1uc;ng bang 1,9926.10-23 gam . Biet
nguyen tu khoi cua Na Ia 23 , nguyen tu khoi cua cacbon Ia 12 . Khoi IUc;Jng tfnh bang gam cua nguyen tu natri Ia :
10
A. 3,82 .1 o-23g
c. 3,82.1 o-21 g
B. 3,82.1 o-22g
D. Tat ca deu sai.
10. Khoi IL1c;Jng thL,J·c cua nguyen tu 0 tfnh ra gam c6 the Ia :
A . 2 ,6568.10-22g
C. 1 ,328.10-22g
B. 2 ,6 .10 -23g
D . 2 ,6568 .10-23g .
11. Nguyen to X dLiQC kf hi$u zX. Tim phat bieu sai.
A. z Ia so dien tfch h<;J.t nhan
B. Z Ia so electron o lop vo va cOng Ia so proton trong nhan
C . Z Ia so thu tij cua nguyen to trong b2mg tuan hoan
D. Cac ph at bieu tren c6 mot cau sai.
12. Trong cac dinh nghla ve nguyen tu sau day, dinh nghla nao Ia
dung?
A . Nguyen tu Ia h<;J.t v6 cung nho be va trung hoa ve di$n, nguyen
tu t9o ra moi chat.
B. Nguyen tu Ia h<;J.t v6 cung nho be, kh6ng bj phan chia trong phan
ung hoa hoc .
C . Nguyen tu Ia h<;J.t v6 cung nho be va trung hoa ve di$n , gom h9t
nhan mang di$n tfch dLidng va vo t<;J.o boi electron mang di$n tfch am.
D . Hit ca deu dung.
NGUYEN TO HOA HQC
13*. Nguyen tu khoi cua nguyen tu cacbon bang 3/4 nguyen tu khoi
cua nguyen tu oxi, nguyen tu khoi cua oxi bang 1/2 nguyen tu' khoi cua
nguyen tu ILiu huynh . Biet nguyen tu khoi cua cacbon Ia 12. Nguyen tu
khoi cua nguyen tu· oxi va nguyen tu ILiu huynh lan ILiQt Ia:
A . 12 va 32
C . 32 va 16
Hay giai thfch slillia chon.
B. Cung Ia 16
D.16va32 .
14. Trong w nhien nguyen to hoa hoc <;:6 the ton t9i o nhO'ng d<;J.ng nao?
11
A . Tl,i do B. Hoa hQp
c . Hon hQp D. Tl,i do va hoa hQp .
Hay chCing minh sl) ll)a chon.
15. Trang cac cau sau day nhQng cau nao dung :
a) Trang kh6ng khi c6 nguyen tu oxi ton t<;~.i a d<;~.ng tl) do
b) Trang khong khi c6 nguyen to oxi
c) Khi sunfuro gom 2 don chat luu huynh va oxi
d ) Khi sunfuro t<;~.o bai hai nguyen to luu huynh va oxi
e ) Kh i sunfuro t<;~.o bai nguyen tu lu·u huynh va nguyen tu oxi.
A. a, b B . a , b , c C. b , d D. c, d, e.
16. Trang cac cau sau day nhQng cau nao sai:
a) Nude gom hai nguyen tu Ia hidro va oxi
b) Muoi an do nguyen to natri va nguyen to clo t<;~.o nen
c) Khi cacbonic gom hai don chat Ia cacbon va oxi
d ) Axit sunfuric do ba nguyen to hidro , luu huynh va oxi t<;~.o nen
e) Axit clohidric gom hai chat Ia hidro va clo.
A. a , b B . c , d C. d , e D . a , c , e .
17. Cho biet cac chat sau day:
a) Kim cuong do nguyen to C t<;~.o nen
b) Canxi cacbonat do 3 nguyen to Ca , C va 0 t<;~.o nen
c) Mu¢i than do nguyen to c t<;~.o nen
d) Than chi do nguyen to C t<;~.o nen
e) RLiQu etylic do ba nguyen to C , H va 0 t<;~.o nen
g) Khi metan do hai nguyen to C va H t<;~.o nen.
Hoi nguyen to cacbon ton t<;~.i a d<;~.ng don chat trong nhQng chat nao?
A. a, b B. a , b, e C. a, c, d D. b, c, e.
12
{[[W+bz0FkV43GmRt7u4DpvuYxd]]}
18. Khi dot chay mot chat trong oxi , nguoi ta dU<;ic nude va khi
cacbonic . Hoi chat d6 dU<;ic cau tc;to bai nhU'ng nguyen to nao?
A . C va H B . C va 0 C . H va 0 D . C , H va 0.
Hay giai thfch stJ ll,ia chQn .
noN ellA T - H($P ellA T - PIIAN Til' I
19. Can eli vao cau tc;to cua chat (do m¢t, hai ho~c ba .. . nguyen to
hoa hQC CaU tc;to nen) ngu'oi taCO the chia cac chat ra lam may loc;ti?
A . Ba loc;ti B . Hai loc;t i c . Bon loc;ti D . Nam loc;ti.
20. Cho cac chat sau day :
a) Khi axetilen do hai nguyen to C va H tc;to nen
b) Kim loc;ti bc;tc do nguyen to bc;tc tc;to nen
c) Phan tu ozon do 30 lien ket v6i nhau
d) Ph an tu ax it photphoric g6m 3H, 1 P va 40 lien ket v6i nhau
e) Khf sunfuric do hai nguyen to S va 0 tc;to nen
g) Ph an tu can xi cacbonat g6m 1 Ca , 1 C va 30 lien ket v6i nhau
h) Phan tu sat gom 1 Fe .
(1) Cac chat a dc;tng ddn chat Ia nhU'ng chat nao?
A . a, b, c B . b , c , d C. b. c, h D. g, e, h.
(2) Cac chat a dc;tng hc;ip chat Ia nhU'ng chat nao?
A. a,d, e , g B . b , c , g , h C . a , b , e , g , h D . c , d , e , g .
21 *. Trong m¢t ph an tu· m uoi sat clorua chua 2 loc;ti nguyen tu sat
va clo. Phan tu khoi cua muoi Ia 127 dvC. So nguyen tu sat va clo trong
muoi nay lan IU<;it Ia :
A . 1 va 1 B. 1 va 2 C . 1 va 3 D. 2 va 3.
Hay giai thfch sl,i ll,ia chQn.
13
22. M¢t h<;ip chat phEm tLt g6m 2 nguyen tLt cua nguyen to X lien
ket vdi 1 nguyen tLt axi va c6 phE'm tLt khoi Ia 62 dvC. X Ia nguyen to
naa sau day?
A.Mg B.Ca C. K D. Na.
23. H<;ip chat Crx( S04 )3 c6 phan tLt khoi Ia 392 dvC . Gia tri cua x Ia
A.2 B. 3 C. 1 D.4
24. Tl 1$ khoi lu<;ing cua 0 va H trang m¢t phan tLt nude Ia 8 : 1.
Trang m<;>t phan tu nude c6 2 nguyen tLt hidra. So nguyen tu axi trang
phan tLt nude Ia:
A. 2 B. 1 C. 1,5 D. 4.
Hay giai thfch sv Iva chQn .
25. a) 8e tc;1a thanh phan tlt CUa mQt h<;ip chat thi toi thieu din phai
c6 baa nhieu lac;1i nguyen tt1?
A. Hai lac;1i nguyen tLt
C. M¢t lac;1i nguyen tu B. Balac;1i nguyentLt
D . A , B, c deu dung.
b) Phat bieu naa sau day ve h<;ip chat Ia dung?
A . Khoi lu<;ing cac nguyen to trang cac mau h<;ip chat Ia khong doi
B . Khoi lu<;ing cac mau h<;ip chat Ia khong doi
C. Til$ khoi lu<;ing cac nguyen to trang h<;ip chat Ia khong doi
D . Khong c6 cau tra loi naa phu h<;ip .
rTric/1 de thi Hoa Dq.,i h9c Quo'c gia Aust rulia nam 1995)
CONG THUC HOA HQC VA HOA TR~
26. Hay ll)'a chQn day cong thuc haa hQC dung cua cac h<;ip chat
chua hai nguyen to sau day:
N (Ill) va H ; AI (Ill) va 0 ; S (II) va H; N (V) va 0; C (II) va 0 .
14
A. NH 3; AI20 3; H2S; N20 3; C02
B. NH3; AI20 3; H2S; N20 5 ; CO
C . NH 3; AI20 3; H2S; N20 s; C02
D . NH 3; AI30 2; H2S; N20 s; CO.
27. Mc)t nguyen tu clo (1 ), mc)t nguyen tu luu huynh (II ), mc)t goc
sunfat (S04 c6 hoa tr! II ), mot goc cacbonat (C03 c6 hoa tr! II) , mc)t goc
photphat (P04 c6 hoa tri Ill ) ian ILJQt c6 the lien ket dLiQc voi bao nhieu
nguyen tu hidro?
A . I , 2 , 3, 2 , 3
C . I , 2 , 3 , 3 , 3
B. 1, 2 , 2 , 2 , 3
D. I , 2 , 2 , 3 , 3 .
28. Hay IL,(a ChQn day c6ng thlfc hoa hQC dung cua cac hQp chat
ma phan tu g6m c6 :
Fe (Ill ) lien ket voi N03 (I); Cu ( II ) lien ket voi Cl ; Na lien ket voi
S04 (II) ; Ca lien ket voi P04 (Ill ).
A . Fe(N03h; CuCI; NaS04; Ca2(P04)3
B. Fe (N03h; CuCI 2; NaS04; Ca3(P04h
C. Fe (N03)3; CuCI2; Na2S04; Ca3( P04)2
D . Fe(N03)2; CuCI2; Na2S04; Ca3(P04)2.
29. a) Biet P (V ) hay chQn c6ng thU'c hoa hQC nao phu hQp voi quy
tac hoa tri trong so cac cong thCfc cho sau day:
b) Bi et N (Ill ) hay chQn c6ng thlfc hoa hQC nao phu hQp voi quy tac
hoa tri trong so cac c6ng thU'c cho sau day :
D . NO.
30. Biet S (VI) hay chQn c6ng thU'c hoa hQC nao phu hQp voi quy
tac hoa tr! trong so cac c6ng thU'c cho sau day:
31. Cho biet c6ng thlfc hoa hQC cua hQp chat t<;~o boi nguyen to A
voi nh6m (S04) hoa trj II va hQp chat cua nh6m nguyen tu B voi H nhLJ
sau : A2(S04h H2B.
15
Hay chon c6ng thuc hoa hoc nEw dung cho hQp chat cua A va B
trong so cac c6ng thuc sau day:
a. AB
32. Biet Cr (crom) hoa tri II va nh6m (P04) hoa tri Ill, hay chon c6ng thuc hoa hoc dung trong so cac c6ng thuc hoa hoc cho sau day :
A. CrP04
33*. Cho biet c6ng thuc hoa hoc cua nguyen to X vdi nh6m (P04)
hoa tri Ill va hQp chat cua nh6m nguyen tu Y vdi H nhll sau : XP04, H3Y .
Hay chon c6ng thuc hoa hoc nao dung cho cac hQp chat cua X va Y trong so cac hQp chat sau day:
B.XY
34. Cho biet c6ng thuc hoa hoc cua nguyen to X vdi 0 va hQp chat
cua nguyen toY vdi H nhu' sau : X20 3 , YH 2 .
Hay chon c6ng thuc hoa hoc nao Ia dung trong cac hQp chat cua X va Y trong so cac hQp chat sau day:
35. Theo hoa tri cua Cr (crom) trong hQp chat c6 c6ng thuc hoa
hoc Cr20 3 , hay chon c6ng thuc hoa hoc dung trong so cac c6ng thuc hQp chat c6 nguyen tu Cr lien ket vdi (S04) hoa tri II sau:
A. CrS04
36. Cho biet c6ng thuc hoa hoc hQp chat cua nguy~n to X vdi S (II)
va hQp chat cua nguyen toY vdi H nhll sau : X2S3 , YH 3.
Hay chon c6ng thuc hoa hoc nao Ia dung trong cac hQp chat cua X va y trong cac hQp chat sau day:
C.XY
37. Cho biet c6ng thuc hoa hoc hQp chat cua nguyen to A vdi S (II)
va hQp chat cua nguyen to B vdi 0 nhll sau: AS , B20 3 .
Hay chon c6ng thuc nao dung trong cac hQp chat cua Ava B trong cac hQp chat sau day:
a. AB
16
38. Trong day c6ng thlic hoa hoc cac h¢p chat voi oxi cua cac nguyen t6 sau day: K (I) ; Cu (I) ; AI (Ill); Pb (IV) ; P (V) ; S (VI).
Hay chon day chi c6 c6ng thlic dung:
A . KO; CuO; AI20 3; Pb02; P20 3; S03
B. K20 ; CuO; AI20 3; Pb02; P20 5 ; S03
C. K20; Cu20 ; AI20 3; Pb02; P20 5 ; S03
D. K02; CuO; AI20 3; PbO; P20 5 ; S02:
39. Hay ll)'a chon day c6ng thlic hoa hoc dung cua cac h¢p chat hai nguyen t6 sau day:
86ng (I va II) va oxi ; Sat (II va Ill) voi clo ; Chi (II ya IV) voi oxi; Thiec (II va IV) voi clo.
A. Cu20 va CuO; FeCI2 va FeCI 3; PbO va Pb20 ; SnCI2 va SnCI4
B. Cu20 va CuO; FeCI2 va FeCI3; Pb02 va Pb20 3 ; SnCI2 va SnCI4
C. Cu20 va CuO; FeCI2 va FeCI 3 ; PbO va Pb02; SnCI va SnCI4
D. Cu20 vaCuO; FeCI2 va FeCI3; PbO va Pb02 ; SnCI2 va SnCI 4 .
Ill. HVdNG DAN GIAI
1. D. 2. D. 3. B.
4. a) B. b) B.
Phuong phap thich h9'P nhat la lam bay hoi n1.16'c muoi, d1.19'C muoi . Phuo·ng phap chung cat c6 the' d1.19'C muoi, nhung ton kern vi tieu hao nang ll19'ng.
5. B.
6. Nguye n tU' la h?t v6 cung nho, Ava B.
7. a) A.
Chinh nhO' electron rna nguyen hi' c6 the lien ket d1.19'C voi nhau .
b) B .
Data la khoi ll19'ng tinh bang gam cua 1 dvC .
2. CH&BTTNHHB-A 17