chuong 5
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Hard
Thảo Nguyễn
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kí hiệu cặp oxi hoá − khử ứng với quá trình khử: Fe2+ + 2e → Fe là
Fe3+/Fe2
Fe2+/Fe
Fe3+/Fe
Fe2+/Fe3+.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong số các ion: Ag+, Al3+, Na+, Mg2+, ion nào có tính oxi hoá mạnh nhất ở điều kiện chuẩn?
Na+
Mg2+.
Ag+.
Al3+.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
. Dãy các kim loại được sắp xếp theo chiều tính khử giảm dần là
K > Na > Mg > Cu > Ag > Al
Ba > K > Ag > Cu > Fe > Al.
K > Mg > Al > Fe > Cu > Ag.
Ca > Zn > Cu > Mg> Fe > Al.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dãy các ion được sắp xếp theo chiều tính oxi hoá giảm dần là
K+ > Mg2+ > Al3+ > Fe2+ > Cu2+.
Fe2+ > Cu2+ > K+ > Mg2+ > Al3+.
Cu2+ > Fe2+ > K+ > Mg2+ > Al3+
Cu2+ > Fe2+ > Al3+ > Mg2+ > K+
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho pin điện hoá Al – Pb. Biết EοAl3+/Al=−1,66V EAl3+/Alο=−1,66V; EοPb2+/Pb=−0,13VEPb2+/Pbο=−0,13V. Sức điện động của pin điện hoá Al – Pb là
1,79V
−1,79V.
−1,53V
1,53V.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Giá trị thế điện cực chuẩn của cặp oxi hoá − khử nào được quy ước bằng 0?
Na+/Na
2H+/H2.
Al3+/Al
Cl2/2Cl–.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ở điều kiện chuẩn, kim loại nào sau đây tác dụng được với dung dịch HCl?
Mg.
Cu
Hg.
Au
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