DE ON LUYEN SO 4
Authored by huyen pham
Chemistry
5th Grade
Used 1+ times
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26 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kim loại nào sau đây dùng làm đồ trang sức và bảo vệ sức khỏe?
Cu
Ag
Au
Fe
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kim loại nào được điều chế bằng phương pháp điện phân nóng chảy?
Na
Fe
Cu
Ag
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Số electron lớp ngoài cùng của kim loại kiềm là
1
2
3
4
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dung dịch nào sau đây phản ứng với dung dịch NaOH không tạo thành kết tủa?
HCl
MgCl2
CuSO4
Fe(NO3)2.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất nào sau đây được dùng để khử chua đất trong nông nghiệp?
CaO
Ca(NO3)2.
CaCl2
CaSO4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Muối nào sau đây dễ bị phân hủy khi đun nóng?
Ca(HCO3)2.
Na2SO4
CaCl2
NaCl
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất nào sau đây có khả năng làm mềm nước cứng toàn phần?
Na3PO4
HCl
NaOH
Ca(OH)2.
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