Đề ôn KTTT giữa HK2 - Lớp 10 (Hóa học)
Quiz
•
Science
•
10th Grade
•
Practice Problem
•
Medium
Ms Tú Anh
Used 2+ times
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30 questions
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1.
MULTIPLE CHOICE QUESTION
10 sec • 2 pts
Trong hầu hết các hợp chất, số oxi hóa của nguyên tử oxygen bằng bao nhiêu?
0
+1
+2
-2
2.
MULTIPLE CHOICE QUESTION
20 sec • 2 pts
Trong ion đa nguyên tử, tổng số oxi hoá của các nguyên tử bằng
số nguyên tử.
số liên kết giữa các nguyên tử.
điện tích ion.
số hiệu nguyên tử.
3.
MULTIPLE CHOICE QUESTION
20 sec • 2 pts
Trong phản ứng oxi hoá - khử, chất khử là chất có số oxi hoá
tăng.
giảm.
vừa tăng vừa giảm.
không thay đổi.
4.
MULTIPLE CHOICE QUESTION
30 sec • 3 pts
Trong phản ứng oxi hóa – khử, quá trình khử là quá trình
nhường electron.
nhận electron.
nhận proton.
nhường proton.
5.
MULTIPLE CHOICE QUESTION
30 sec • 3 pts
Cho quá trình: 2Cl- → Cl2 + 2e. Đây là quá trình
oxi hoá.
khử.
nhường proton.
tự oxi hoá - khử.
6.
MULTIPLE CHOICE QUESTION
20 sec • 3 pts
Trong phản ứng hoá học: 2Na + H2SO4 → Na2SO4 + H2 mỗi nguyên tử Na đã
nhường 2 electron.
nhận 2 electron.
nhường 1 electron.
nhận 1 electron.
7.
MULTIPLE CHOICE QUESTION
30 sec • 3 pts
Trong phản ứng hoá học: Mg + 2HCl → MgCl2 + H2. Chất oxi hoá là
Mg
HCl
MgCl2.
H2.
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