
Phản ứng oxi hóa khử
Authored by Như Nguyễn
Chemistry
University
Used 3+ times

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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Số oxi hóa của nguyên tố N trong hợp chất NH4Cl là
-3
+3
+2
+5
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phản ứng nào sau đây là phản ứng oxi hóa – khử?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất oxi hóa
Chất khử
Chất tạo môi trường
Vừa là chất khử vừa là chất tạo môi trường
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho các chất sau: Cl2, HCl, NaOCl, KClO3, HClO4. Số oxi hóa của nguyên tử Cl trong phân tử các chất trên lần lượt là
0; +1; +3; +5; +7
0; -1; +1; +5; +7
0; -1; -1; -5; -7
0; 1; 1; 5; 7
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sục khí SO2 vào dung dịch KMnO4 (thuốc tím), màu tím nhạt dần rồi mất màu (biết sản phẩm tạo thành là MnSO4, H2SO4 và H2O). Nguyên nhân là do
SO2 đã oxi hóa KMnO4 thành MnO2
SO2 đã khử KMnO4 thành Mn2+
KMnO4 đã khử SO2
thành S+6
H2O đã oxi hóa KMnO4 thành Mn2+
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