
on gk ii 12
Authored by Chí Thành
Chemistry
12th Grade
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kim loại nào sau đây điều chế được bằng phương pháp thủy luyện?
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ở trạng thái cơ bản, số electron lớp ngoài cùng của nguyên tử kim loại kiềm là
1
2
3
4
Pluto
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Công thức của natri hidroxit là
Na(OH)2.
NaO2.
Na2O.
NaOH.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Để bảo quản natri, người ta phải ngâm natri trong
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dung dịch Na2CO3 tác dụng được với dung dịch:
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nung CaCO3 ở nhiệt độ cao, thu được chất khí X. Chất X là
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất nào sau đây có khả năng làm mềm nước cứng vĩnh cửu ?
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