hóa full
Quiz
•
Chemistry
•
10th Grade
•
Practice Problem
•
Medium
Phi 69
Used 7+ times
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96 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong phản ứng sau: Cl2 + 2NaI → 2NaCl + I2 ; chất đóng vai trò chất oxi hoá là
NaI
Cl2
NaCl
I2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phản ứng oxi hóa – khử là phản ứng hoá học, trong đó có sự thay đổi
số mol.
số oxi hóa.
số proton.
số khối.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phản ứng oxi hóa – khử là phản ứng có sự nhường và nhận
electron.
neutron.
proton.
cation.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong phản ứng oxi hóa - khử, chất oxi hóa là chất
nhường electron
nhận proton.
nhận electron.
nhường proton.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong phản ứng:2Na + Br2 → 2NaBr, Na đóng vai trò là
chất bị khử.
chất xúc tác.
chất khử.
chất oxi hóa.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Số oxi hóa của nguyên tử Cl trong hợp chất HClO là
+1.
+2.
-1.
-2.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Số oxi hóa của Mn trong KMnO4 là
+7
+3
+4
-3
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