
HÓA 15 PHÚT -CHƯƠNG 1
Authored by Hoang Pham
Chemistry
11th Grade
Used 6+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cho dãy các chất: KAl(SO4)2.12H2O, C2H5OH, C12H22O11 (saccarozơ), CH3COOH, Ca(OH)2, CH3COONH4. Số chất điện li là
3
4
5
2
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Dung dịch chất nào sau đây dẫn được điện?
C2H5OH trong nước.
C6H12O6 trong nước.
Glixerol trong nước.
CaCl2 trong nước.
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Trường hợp nào có phản ứng xảy ra:
Na2SO4 + Zn(NO3)2.
NaOH + MgCl2.
KNO3 + BaCl2.
FeCl2 + K2SO4.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Chất có tính chất lưỡng tính là:
AlCl3.
Zn(OH)2.
CuSO4.
KNO3.
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Cho phản ứng sau: FeS(r) + 2HCl → FeCl2 + H2S. Phương trình ion rút gọn của phản ứng trên là:
H+ + S2- → H2S↑
Fe2+ + 2Cl- → FeCl2
FeS + 2H+ → Fe2+ + H2S↑
FeS + H+ → FeCl2 + H2
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Theo thuyết A-re-ni-ut, axit là chất
khi tan trong nước phân li ra ion H+.
khi tan trong nước chỉ phân li ra ion H+.
khi tan trong nước phân li ra ion OH- .
khi tan trong nước chỉ phân li ra ion OH-.
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Một dung dịch chứa 2 cation là Fe2+ (0,1 mol) và Al3+ (0,2 mol) và 2 anion là Cl– (x mol) và SO42– (y mol). Khi cô cạn dung dịch thu được 46,9 g chất rắn khan. Giá trị x, y là
x = 0,29; y = 0,006
x = 0,2; y = 0,3
x = 0,1; y = 0,4
x = 0,4; y = 0,1
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