
REDOKS XII
Authored by yulianwar 77
Chemistry
University
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9 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Baterai “button cell” yang digunakan pada kalkulator terjadi reaksi sebagai berikut:
Zn(s) + HgO(s) + H2O(l) → Zn(OH)2(s) + Hg(l)
Spesi yang bertindak sebagai oksidator dan hasil oksidasi adalah ....
(A) Zn(s) dan Zn(OH)2(s)
(B) Zn(s) dan HgO(s)
(C) HgO(s) dan Hg(s)
(D) HgO(s) dan Zn(OH)2(s)
(E) H2O dan Zn(OH)2(s)
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Perhatikan persamaan reaksi redoks berikut!
Sn(s) + 4HNO3(aq) → SnO2(s) + 4NO2(g) + 2H2O(l)
Bilangan oksidasi dari zat oksidator dan hasil reduksinya berturutturut
adalah ....
+1 , Sn
+1, SnO2
+4, NO2+5, NO2
+4, NO2
+5, HNO3
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diberikan lima persamaan reaksi oksidasi atau reduksi yang belum setara:
(1) MnO4- → MnO42-
(2) SO2 → SO3
(3) C2H4 → C2H6
(4) FeO → Fe2O3
(5) Cl2 + 2e- → 2Cl-
Kelompok persamaan reaksi yang mengalami reduksi ditunjukkan oleh nomor ....
A. (1), (2) dan (3)
B. (1), (3) dan (5)
C. (1), (3) dan (4)
D. (2), (3) dan (4)
E. (2), (3) dan (5)
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Perhatikan persamaan reaksi redoks berikut!
MnO2(s) + 2H2SO4(aq) + 2NaI (aq) → MnSO4(aq) + Na2SO4(aq) + 2H2O(l) + I2(g)
Spesi yang merupakan oksidator pada persamaan reaksi tersebut adalah ...
MnO2, karena mengalami penurunan bilangan oksidasi
H2SO4, karena mengalami kenaikan bilangan oksidasi
NaI, karena dapat mereduksi H2O
Mn2+, karena dapat mengoksidasi H2O
I–, kara mengalami reaksi reduksi
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Bilangan oksidasi Cr pada ion Cr2O72– dan senyawa K2CrO4 secara berurutan adalah :
A. +3 dan +3
B. +4 dan +3
C. +5 dan +5
D. +6 dan +4
E. +6 dan +6
A. +3 dan +3
B. +4 dan +3
C. +5 dan +5
D. +6 dan +4
E. +6 dan +6
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Di ketahu Persamaan reaksi redoks sebagai berikut :
a MnO4- + 6H+ + b C2H2O4 → a Mn2+ + 8H2O + CO2
2 dan 3
2 dan 4
2 dan 5
3 dan 5
4 dan 4
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui persamaan Reaksi redoks berikut :
aNaI + bHOCl → cNaIO3 + d HCl
Nilai a, b, c dan d berturut- turut
1 ,3,1 dan 3
2, 3, 2 dan 3
2, 3 , 3 dan 2
2, 6,2 dan 6
1, 5, 2 dan 5
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