UH Redoks dan Elektrokimia

Quiz
•
Chemistry
•
12th Grade
•
Medium
Muhammad Abidin
Used 3+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
5 mins • 8 pts
1. Perhatikan reaksi redoks berikut
1) Br- → Br2
2) Cr2O72- → Cr3+
3) C2H4 → C2H6
4) FeO → Fe2O3
Diantara reaksi redoks diatas, manakah yang terjadi reaksi reduksi?
a. 1) dan 2)
b. 2) dan 4)
c. 2) dan 3)
d. 1) dan 4)
2.
MULTIPLE CHOICE QUESTION
5 mins • 8 pts
2. Diantara reaksi berikut yang termasuk reaksi autoredoks adalah …
a. Na + H2O → NaOH + H2
b. MnO2 + HCl → MnCl2 + H2O + Cl2
c. KOH + Cl2 → KCl + KclO + H2O
d. Cl2 + KBr → KCl + Br2
3.
MULTIPLE CHOICE QUESTION
5 mins • 8 pts
3. Perhatikan persamaan reaksi berikut
1) I2 + AgF → Agl + IF5
2) Al(OH)3 + HCl → AlCl3 + H2O
3) Sn + HNO3 → SnO2 + NO2 + H2O
4) MgCO3 + 2HCl → MgCl2 + CO2 + H2O
Di antara persamaan reaksi di atas, manakah yang tergolong dalam reaksi redoks?
a. 1)
b. 2)
c. 3)
d. 4)
4.
MULTIPLE CHOICE QUESTION
5 mins • 8 pts
4. Perhatikan data potensial elektroda standar berikut
Al (aq) + 3e- → Al (s) E0Sel = -1,76 volt
Zn2+ (aq) + 2e- → Zn (s) E0Sel = -0,76 volt
Fe2+ (aq) + 2e- → Fe (s) E0Sel = -0,44 volt
Cu2+ (aq) + 2e- → Cu (s) E0Sel = +0,34 volt
Diagram sel volta yang memiliki nilai E0Sel nya lebih besar adalah …
a. Al | Al3+ || Cu2+ | Cu
b. Al | Al3+ || Zn2+ | Zn
c. Al | Al3+ || Fe2+ | Fe
d. Fe | Fe2+ || Al3+ | Fe
5.
MULTIPLE CHOICE QUESTION
2 mins • 8 pts
5. Perhatikan data percobaan tentang kondisi yang diperlukan untuk perkaratan pada gambar berikut.
Berdasarkan percobaan di atas, faktor utama yang menyebabkan perkaratan besi adalah
a. Adanya air
b. Adanya air dan udara
c. Adanya paku
d. Adanya udara
6.
MULTIPLE CHOICE QUESTION
2 mins • 8 pts
6. Cara yang tepat untuk pencegahan korosi pada besi penopang bangunan atau jembatan adalah …
a. Dilapisi cat
b. Dilumuri oli
c. Dilapisi seng
d. Dilapisi timah
7.
MULTIPLE CHOICE QUESTION
5 mins • 8 pts
7. Elektrolisis larutan CuSO4 dengan elektroda Fe, maka zat yang terbentuk di katoda dan anoda adalah
a. Cu, O2, dan H
b. Cu dan Fe2+
c. Cu dan H2
d. H2 dan O2
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