ĐỀ 2 (27/4) - 5Đ NB
Quiz
•
Chemistry
•
12th Grade
•
Medium
Nguyen Hanh
Used 5+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kim loại nào sau đây khử được ion Ag+ trong dung dịch AgNO3?
Ca.
Na.
Zn.
K
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Số nhóm amino (-NH2) có trong một phân tử lysin là
1
2
3
4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Một mẫu nước cứng có chứa các ion: Ca2+, Mg2+, Cl- và SO42- . Dùng dung dịch chất nào sau đây để làm mềm mẫu nước cứng trên?
NaNO3.
KNO3.
NaCl.
Na3PO4.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
FeS2.
FeCO3.
Fe3O4.
Fe2O3.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Vôi sống (CaO).
Thạch cao nung (CaSO4.H2O).
Đá vôi (CaCO3).
Thạch cao sống (CaSO4.2H2O).
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Este nào sau đây nào sau đây có công thức phân tử là C4H8O2?
Phenyl axetat.
Etyl propionat.
Metyl axetat.
Propyl fomat.
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