REDOKS
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Hard
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30 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Reaksi redoks
a Cr2O7 (aq) + b C2O42- (aq) + c H+ → d Cr3+ (aq) + e CO2 (g) + f H2O (l)
setelah disetarakan mempunyai harga a, b, d, e berturut-turut....
1, 3, 1, 6
. 1, 3, 2, 6
2, 3, 2, 6
2, 3, 2, 3
6, 2, 3, 1
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Di antara persamaan reaksi berikut, yang merupakan reaksi redoks adalah....
NaOH (s) + HCl (aq) → NaCl (aq) + H2O (l)
. CaSO4 (aq) + 2 LiOH (aq) → Ca(OH)2 (s) + Li2SO4 (aq)
Mg(OH)2 (s) + 2 HCl (aq) → MgCl2 (aq) + 2 H2O (l)
BaCl2 (aq) + H2SO4 (aq) → BaSO4 (s) + 2 HCl (aq)
. MnO2 (s) + HCl (aq) → MnCl2 (aq) + 2 H2O (l) + O2 (g)
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Persamaan reaksi redoks:
a Cl2 + b OH → c Cl + ClO3 + d H2O
Harga koefisien a, b, c, dan d adalah ....
3, 6, 5, dan 3
3, 5, 6, dan 3
3, 6, 5, dan 2
3, 6, 5, dan 1
3, 5, 6, dan 2
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Pada reaksi :
Cl2 (aq) + 2 KOH (aq) → KCl (aq) + KClO (aq) + H2O (l)
bilangan oksidasi klor berubah dari :
–1 menjadi +1 dan 0
+1 menjadi -1 dan 0
. 0 menjadi –1 dan -2
–2 menjadi 0 dan +1
0 menjadi –1 dan +1
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Gas nitrogen monoksida merupakan gas yang tidak berwarna dan beracun. Gas tersebut dapat dihasilkan dari reaksi asam sulfida dengan asam nitrat, dengan persamaan reaksi :
3 H2S(g) + 2 HNO3(aq) + 6 H+(aq) → 2 NO(g) + 2 S(s) + 4 H2O(l)
Spesi yang merupakan oksidator adalah ...
H2S
HNO3
NO
S
H2O
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Koefisien reaksi atau nilai a, b, c, dan d dari persamaan reaksi:
a SO2 (g) + b H2S (g) → c H2O (l) + d S(s)
berturut-turut adalah...
1, 2, 2, 3
1, 2, 1, 3
1, 3, 1, 2
2, 1, 2, 1
2, 1, 1, 3
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Gas klor dapat dibuat melalui reaksi redoks berikut:
a K2Cr2O7 (aq) + 14 HCl (aq) → 2 KCl (aq) + b CrCl3 (aq) + c Cll2 (aq) + d H2O(l)
Setelah disetarakan, nilai koefisien reaksi a, b, c, dan d secara berurutan adalah....
1, 2, 2, 7
1, 2, 3, 7
1, 2, 1, 7
2, 1, 2, 7
2, 2, 3, 7
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