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12th Grade
•62 Qs
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KoroneSuki
Quiz
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Chemistry
•
12th Grade
•
Practice Problem
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Medium
Tâm Lê
Used 1+ times
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62 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cấu hình electron nào sau đây là của nguyên tố Fe?
[Ar] 4s23d6.
[Ar]3d64s2.
[Ar]3d8.
[Ar]3d74s1.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cấu hình electron nào sau đây là của ion Fe2+?
[Ar]3d6.
[Ar]3d5.
[Ar]3d4.
[Ar]3d3.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cấu hình electron nào sau đây là của ion Fe3+?
[Ar]3d6.
[Ar]3d5.
[Ar]3d4.
[Ar]3d3.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho phương trình hoá học: aAl + bFe3O4 → cFe + dAl2O3 (a, b, c, d là các số nguyên, tối giản). Tổng các hệ số a, b, c, d là?
25.
24.
27.
26.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong các loại quặng sắt, quặng có hàm lượng sắt cao nhất là?
Hematit nâu.
Manhetit.
Xiđerit.
Hematit đỏ.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hai dung dịch đều phản ứng được với kim loại Fe là?
CuSO4 và ZnCl2.
CuSO4 và HCl.
ZnCl2 và FeCl3.
HCl và AlCl3.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho sắt phản ứng với dung dịch HNO3 đặc, nóng thu được một chất khí màu nâu đỏ. Chất khí đó là?
NO
N2O
NO2
N2
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