
ĐIỀU CHẾ KL, KLK, KLKT
Authored by Quỳnh Phạm
Chemistry
1st Grade
Used 3+ times

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36 questions
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1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
CO khử được oxit kim loại nào sau đây?
BaO
Al2O3
CuO
Fe2O3
ZnO
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Phương pháp nhiệt luyện điều chế được kim loại nào sau đây?
Fe
Na
Mg
K
Cu
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong phân tử BaSO4, Ba có số oxi hóa là
+1
+2
-2
-1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho CO dư đi qua hỗn hợp CuO, MgO, Al2O3, FeO, Fe3O4 sau phản ứng hoàn toàn thu được hỗn hợp rắn gồm
Cu, MgO, Al, Fe
Cu, MgO, Al, FeO
Cu, MgO, Al2O3, Fe
Cu, Mg, Al2O3, Fe
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong phân tử NaCl, Na có số oxh là
+1
-1
+2
-2
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
H2 không khử được oxit nào sau đây
CuO
Na2O
MgO
Al2O3
Fe2O3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Số oxi hóa của kim loại kiềm thổ trong hợp chất là
+1
+2
-1
-2
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