PENILAIAN TENGAH SEMESTER GANJIL
Quiz
•
Chemistry
•
11th Grade
•
Practice Problem
•
Hard
Een Suminar
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35 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
Bilangan Oksidasi unsur belerang dalam senyawa Na2S2O3 adalah… .
+5
+4
+3
+2
+1
2.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
Pada masing-masing perubahan berikut, yang merupakan contoh reaksi oksidasi adalah….
Cu2+ menjadi Cu
F2 menjadi F-
Cl- menjadi Cl2
Cr2O72- menjadi CrO42-
H2O menjadi H+
3.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
Bilangan oksidasi unsur Cr dalam senyawa CrO42- adalah… .
+6
+5
+4
+3
+2
4.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
Biloks atom Cl tertinggi di antara senyawa berikut adalah… .
KCl
KClO
CaCl2
KClO3
KClO2
5.
MULTIPLE CHOICE QUESTION
15 mins • 2 pts
Biloks Mn tertinggi terdapat pada senyawa… .
KMnO4
MnO2
K2MnO4
MnCl2
MnS
6.
MULTIPLE CHOICE QUESTION
15 mins • 2 pts
Diketahui beberapa reaksi sebagai berikut:
(1) MnO4 → MnO2
(2) Zn → ZnO2-
(3) 2 CO2 → C2O42-
(4) Cr2O3 → CrO4
Peristiwa reduksi terjadi pada pasangan….
(1) dan (2)
(1) dan (3)
(1) dan (4)
(2) dan (3)
(2) dan (4)
7.
MULTIPLE CHOICE QUESTION
15 mins • 2 pts
Pada reaksi berikut: Cl2 + 2 KOH → KCl + KClO + H2O
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
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