Đề ôn tập số 3 - khối 12
Quiz
•
Chemistry
•
12th Grade
•
Easy
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28 questions
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1.
MULTIPLE CHOICE QUESTION
10 sec • 5 pts
Cl2.
O2.
N2.
F2.
2.
MULTIPLE CHOICE QUESTION
10 sec • 5 pts
3.
MULTIPLE CHOICE QUESTION
10 sec • 5 pts
4.
MULTIPLE CHOICE QUESTION
10 sec • 5 pts
5.
MULTIPLE CHOICE QUESTION
10 sec • 5 pts
Mg2+, Na+.
Ca2+, Na+.
Ba2+, Ca2+.
Ca2+, Mg2+.
6.
MULTIPLE CHOICE QUESTION
10 sec • 5 pts
Cho các chất sau: Cr2O3, K2CrO4, Cr2(SO4)3, K2Cr2O7. Số oxi hóa crom trong các hợp chất lần lượt là
7.
MULTIPLE CHOICE QUESTION
10 sec • 5 pts
Quặng nào sau đây có thành phần chính là Al2O3?
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