hoá ôn tập
Authored by Danh Phan
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9th - 12th Grade
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14 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong phản ứng 8Al+3FE3O4-->4Al2O3+9Fe. Chất bị khử là
Al
Fe3O4
Al2O3
Fe
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong phản ứng Zn+CuSO4-->ZnSO4+Cu. Chất bị oxi hóa là
Cu
Zn
CuSO4
ZnSO4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Số oxi hóa của iron(Fe) trong Fe2O3 là
-6
-3
+3
+6
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho quá trình 2N+10e/NO2--> N2 . Nhận xét nào nào đúng?
Quá trình trên là quá trình oxh
N+5 là chất oxh
Quá trình trên là sự oxi hoá
N+5 là chất bị oxh
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong hợp chất H2SO4 ,số oxi hoá của sulfur là
+2
+3
+4
+6
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho quá trình:Fe-->Fe³±+3e.Đây là quá trình
Oxi hoá
Khử
Nhận proton
Tự oxi hoá-khử
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong phản ứng oxi hóa khử, chất bị khử là chất
Nhường electron
Nhận electron
Nhận proton
Nhường proton
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