Rela menjadi penolong sesamaku
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Chemistry
•
10th Grade
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Practice Problem
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Yenny Dwi
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Di antara reaksi-reaksi tersebut di bawah ini yang merupakan contoh reaksi redoks adalah ….
AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)
2KI(aq) + Cl2(aq) → I2(s) + 2KCI(aq)
NH3(aq) + H2O(l) → NH4+(aq) + OH-(aq)
NaOH(aq) + CH3COOH(aq) → CH3COONa(aq) + H2O(l)
Al2O3(s) + 2NaOH(aq) → 2NaAlO2(aq) + H2O(l)
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Pada reaksi :
4HCl (aq) + 2S2O3-2 (aq) → 2S (s) + 2SO2 (g) + 2H2O (l) + 4Cl- (aq)
bilangan oksidasi S berubah dari ….
+2 menjadi 0 dan +4
+5 menjadi +2 dan 0
+3 menjadi 0 dan +4
+6 menjadi -2 dan +4
+4 menjadi 0 dan +2
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Perhatikan persamaan reaksi :
K2Cr2O, (s) + 14HCl (aq) → 2KCl(aq) + 2CrCl3 (aq) + 3Cl2 (g) + 7H2O(l).
Unsur-unsur yang mengalami perubahan bilangan oksidasi pada persamaan reaksi tersebut adalah ….
Cr dan Cl
K dan Cl
Cr dan H
H dan O
O dan Cl
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Bilangan oksidasi Br terendah terdapat pada senyawa ….
Fe(BrO2)3
Ca(BrO)2
HBrO4
AlBr3
KBrO3
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Peristiwa dalam kehidupan sehari-hari berikut ini yang bukan merupakan reaksi redoks adalah ....
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Perhatikan persamaan reaksi redoks berikut
Sn + 4HNO3 → SnO2 + 4NO2 + 2H2O
Bilangan oksidasi dari zat reduktor dan hasil oksidasinya berturut-turut adalah ....
0, SnO2
+1, SnO2
+4, NO2
+5, NO2
+5, HNO3
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Pasangan yang tepat antara rumus dan nama senyawanya adalah ....
(1) dan (3)
(1) dan (4)
(2) dan (3)
(2) dan (4)
(3) dan (5)
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