hóa ck2
12th Grade
•62 Qs
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hóa ck2
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Hard
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62 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất rắn sau phản ứng là
Cu, Fe, Zn, MgO
Cu, FeO, ZnO, MgO
Cu, Fe, ZnO, MgO
Cu, Zn, Mg, Fe
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho Na kim loại (dư) vào dung dịch CuCl2 sẽ thu được kết tủa là
Cu
A, B, C đều đúng
CuCl
Cu(OH)2
3.
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
Zn2+ + Cu2+ → Cu + Zn
Cu2+ + Zn → Zn2+ + Cu
Cu + Zn → Cu2+ + Zn2+
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Bố trí sơ đồ thí nghiệm như hình bên. Kim loại nào bị ăn mòn?
Không kim loại nào bị ăn mòn
Cu
Cả hai kim loại
Zn
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trường hợp nào sau đây là ăn mòn điện hoá học?
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đặc điểm nào sau đây là chung cho các kim loại kiềm?
điện tích hạt nhân của nguyên tử
số lớp electron
số electron ngoài cùng của nguyên tử
bán kính 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 :
Ne
Ag
Na
Au
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