
hóa học
Authored by Nguyn HL
Education
10th Grade
Used 1+ times

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54 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 1: Số oxi hóa của đơn chất luôn bằng
A. 0
B. +1
C. -2
D. -1.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A
B
C
D
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A
B
C
D
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A
B
C
D
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A
B
C
D
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 6: Phản ứng nào sau đây là phản ứng toả nhiệt?
A. Phản ứng nhiệt phân muối KNO3.
B. Phản ứng phân hủy khí NH3.
C. Phản ứng oxi hoá glucose trong cơ thể.
D. Phản ứng hoà tan NH4Cl trong nước.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 7: Nguyên tố Floruine có thể có những số oxi hóa là -1 và 0. Vậy phân tử F2 thể hiện tính chất nào sau đây ?
A. tính oxi hóa.
B. tính khử.
C. vừa có tính khử vừa có tính oxi hóa.
D. Cho proton.
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