redoks 12
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Medium
Ahmad Fauzi
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20 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Reaksi klorin dengan basa membentuk klorida dan hipoklorit menurut reaksi:
Cl2(g) + 2NaOH (aq) → NaCl (aq) + NaClO (aq) + H2O (l)
Zat yang mengalami reaksi autoredoks beserta perubahan bilangan oksidasinya adalah .…
Cl2 dari -1 menjadi +1 dan 0
Cl2 dari +1 menjadi -1 dan 0
NaOH dari 0 menjadi -1 dan +1
NaOH dari -1 menjadi +1 dan 0
Cl2 dari 0 menjadi -1 dan +1
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui E0
Zn2+ | Zn = -0,76 volt
Fe2+ | Fe = -0,44 volt
Pb2+ | Pb = -0,13 volt
Cu2+ | Cu = +0,34 volt
Ag2+ | Ag = +0,80 volt
Diagram sel yang berlangsung spontan adalah …
Cu2+ | Cu || Zn2+ | Zn
Ag2+ | Ag || Fe2+ | Fe
Ag2+ | Ag || Zn2+ | Zn
Pb2+ | Pb || Cu2+ | Cu
Pb2+ | Pb || Zn2+ | Zn
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui beberapa persamaan reaksi berikut:
- C2O42− → 2CO2 + 2e;
- Al3+ + 3e → Al;
- Pb2+ + 2e → Pb;
- Ca → Ca2+ + 2e.
Persamaan reaksi reduksi ditunjukkan pada nomor ....
(1) dan (3)
(1) dan (4)
(2) dan (3)
(2) dan (4)
(3) dan (4)
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Persamaan reaksi redoks:
a ClO− + Bi2O3 + b OH− → c Cl− + d BiO3− + H2O
Harga koefisien a, b, c, dan d adalah ….
2, 2, 2, dan 3
3, 3, 3, dan 2
2, 1, 2, dan 2
2, 2, 2, dan 2
2, 2, 1, dan 2
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Paku yang mengalami perkaratan paling lambat adalah ....
1
2
3
4
5
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Perhatikan sel elektrolisis berikut ini!
Reaksi yang terjadi di katoda adalah ....
C(s) + O2(g) → CO2(g)
K+(aq) + e → K(s)
2H2O(l) + 2e → H2(g) + 2OH−(aq)
2I−(aq) → I2(s) + 2e
4OH−(aq) → 2H2O(l) + O2(g) + 4e
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Proses elektrolisis lelehan NaCl dengan elektroda karbon digunakan arus sebesar 10 ampere selama 30 menit. Massa logam natrium yang diperoleh adalah .... (Ar Na = 23, Cl = 35,5)
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