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•62 Qs
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Hóa HKII
Quiz
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Chemistry
•
12th Grade
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Practice Problem
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Medium
Phương Trần
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62 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho luồng khí H2(dư) qua hỗn hợp các oxit gồm CuO, Fe2O3, ZnO nung ở nhiệt độ cao. Chất rắn sau phản ứng là
Cu, Fe, Zn, MgO
Cu, Fe, ZnO, MgO
Cu, Zn, Mg, Fe
Cu, FeO, ZnO, MgO
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho Na kim loại (dư) vào dung dịch CuCl2 sẽ thu được kết tủa là
Cu(OH)2
Cu
CuCl
A,B,C đúng
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Bố trí sơ đồ thí nghiệm như hình bên. Kim loại nào bị ăn mòn
Zn
Cả hai
Cu
Không cái nào
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phản ứng giữa hai cặp oxi hóa khử Zn2+/Zn và Cu2+/Cu xảy ra theo phương trình
Zn2+ +Cu->Cu2+ +Zn
Cu2+ +Zn->Zn2+ +Cu
Cu+Zn->Cu2+ +Zn2+
Zn2+ +Cu2+->Cu+Zn
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trường hợp nào sau đây là ăn mòn điện hóa học
A
B
C
D
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đặc điểm nào sau đây là chung cho các kim loại kiềm?
bán kính nguyên tử
số electron ngoài cùng của nguyên tử
số lớp electron
điện tích hạt nhân của nguyên tử
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nguyên tố nào sau đây chỉ có ở trạng thái hợp chất trong tự nhiên :
Au
Na
Ne
Ag
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