C. Nude brom va Ca{0H)2 D KMn04 vaN aOH.
1) dung dich KMn04 2) dung dich Ca(0H )2 3) dung dich Br
Ạ 1;2;3 B. 1 C. 2 D. 1;3
B a i 48: Chia m gam m gam hdn hgp hai ancol t h a n h hai phan bang
nhaụ
Phan 1: Dot chay hoan toan, t h u difgc 4,48 l i t k h i CO2 (dktc)
Phan 2: Dehidrat hoa hoan toan t h u diTote h6n hgfp hai anken. Neu dot chay hét hai anken t h i t h u dufgfc bao nhieu gam ni/dc? Ạ 0,72 gam B. l,8gam C.l,08gam D. 3,6gam.
B a i 49: Melamin va ure la 2 chat tCmg dtfOc dUa vao thiic pham vdi muc dich Ạ Tang do dam
B. Bo sung khoang chat can t h i e t
C. N a n g h a m liiofng n i t d t r o n g thiic pham D. Bao quan thuc pham k h o i 6i moc.
B a i 50: T i n h k h o i li/ofng glucozd trong niJdc qua nho de sau k h i len men cho ta 100 l i t vang 10°. Biet hieu suat phan ufng len men dat 9^%, ancol etylic cd k h o i lacfng r i e n g la 0,8g/ml. Gia t h i e t r a n g trong niJdc qua nho chi cd glucozcf len men tao ancol.
Ạ 15,26kg B. 17,52kg C.16,476kg D.18kg.
T h e o chifofng t r i n h N a n g cao (10 cau, tii cau 51 den cdu 60)
B a i 51: Pha loang dung dich H C l cd p H = 3 bao nhieu Ian de dirge dung dich cd p H = 4?
Ạ 5 B. 4 C.9 D.IỌ B a i 52: So v d i ancol cung so cacbon, andehit cd B a i 52: So v d i ancol cung so cacbon, andehit cd
Ạ nhiet do soi cao hcfn B. t a n trong nirdc nhieu han
C. n h d m ehiJc chiTa no D. lien ket hidro vdi nude ben han. B a i 53: A x i t nao cd cong thiJc đn gian nhat la C3H4O3?
Ạ C2H4(COOH)2 B. C6H9(COOH)3
C.C3H5(COOH)3 D. CH2(COOH)2.
B a i 54: Cd hai la k i m loai M . M o t la nhiing vao dung dich Pb(N03)2; mot la nhiing vao dung dich Cu(N03)2. Sau mot t h d i gian lay m o i la
r a can, thay mot l a cd k h o i lirgng tang, mot la cd khói lirgng giam so vdi trirdc p h a n ufng. Vay M cd the l a k i m loai nao dirdi day
B a i 55: 23,8 gam k i m loai X t a n trong dung dich H C l vixa du tao dung
dich X^^ Dung dich nay tac dung viTa du vdi 400ml dung dich FeClg
I M tao ra ion X'^\
Vay X la:
Ạ Fe B. Sn C. Pb D. Cr.
B a i 56: Dung dich X chiJa CrCls I M . Lay 200ml dung dich X cho tac dung vdi V m l dung dich N a O H 2 M , sau phan dng t h u daoc 10,3 gam ket tuạ V c6 gia t r i la:
Ạ 150ml B . 300ml hoSc 600ml
C. 350ml D- 150ml hoSc 350ml.
B a i 57: Chuan do 50,00ml dung dich N a O H 0,05M hkng dung dich H C l
0,10M. Gia t r i p H cua dung dich sau k h i da t h e m nhCfng the tich H C l : 24,50ml va 25,50ml Ian luot la:
Ạ 10,38 va 3,18 B . 3,18 va 10,83
C . 9,81 va 4,32 D. 4,32 va 9,81.
C a u 58: Chat c6 cong thutc phan tuf nao diTdi day c6 the tac dung vdi N a O H theo t i le mol 1 : 2?
Ạ C T H S O B . C5H12O2 C . CeHeOz D. C 3 H 4 O 2 .
B a i 59: Phan ling C H 3 N H 2 + H N O 2 ^ C H 3 O H + Ng + H 2 O , cho thay
C H 3 N H 2 la hop chat:
Ạ Co t i n h bazcf B. Co t i n h khuf C. Co t i n h oxi hoa
D. Co the dong vai tro moi trifdng trong cac phan ufng oxi hoa khijf.
B a i 60: De phan biet 4 lo m a t n h a n chda cac dung dich: glucoza, saccarozo, ancol etylic va fomon, ta chi can dung
Ạ C u ( 0 H) 2/ 0 H - B. Na
C. N a O H D. Dung dich AgNOg/NHạ
Cho biet khoi lugng nguyen ti2 (theo dvC) cua cac nguyen to: H = 1; He = 4 ;C = 12; N = 14; O = 16; F = 19; Ne = 20; Na = 23; Mg = 24; Al = 27; S = 32; CI = 35,5; K = 39; Ca = 40; Cr = 52; Mn = 55; Fe = 56; Cu = 64; Br = 80; Ag = 108; Ba = 137.
Ma de 116
D E THI THUf D^il HQC VA CAO D A N G
M o n t h i : Hoa hoc
Thai gian lam bai 90 phut
Ị PHAN CHUNG CHO TAT CA C A C THl SINH (40 c^u, tCf c§u 1 d^n cSn 40) B a i 1: Ion X^" c6 cau h i n h e Idp ngoai cung la 3s^ 3p^. CJ t r a n g thai cO
ban, so electron doc t h a n cua X la
[ A . 4 B. 8 C. 2 D.6.
B a i 2: E la hop chat hO-u ccf, cong thufc phan tijf C9H16O4. Thuy phan E (xuc tac axit) dtfofc axit cacboxylic X va 2 ancol Y, Z. Biet Y, Z deu c6
I kha nang tach nude tao anken. So cacbon cua Y gap 2 Ian so cacbon { ciia Z, X la:
I Ạ A x i t malonic B. A x i t acrylic C. A x i t oxalic D. A x i t axetic.
I B a i 3: M o i ngay ccf the mot ngudi can trung binh la 0,2mg iot. Khoi
I liiong KIO3 dap ufng yeu cau tren la:
' Ạ 0,118mg B. 4,28mg C. 0,337mg D. 0,674mg.
i B a i 4: X la chat hCfu ccf c6 cong thufc phan tuf C8H15O4N. X tac dung vdi
I dung dich NaOH dun ndng cho ra hon hop metanol, etanol va muoi natri