Seleksi Lomba Kimia 24/25

Seleksi Lomba Kimia 24/25

1st Grade

20 Qs

quiz-placeholder

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Seleksi Lomba Kimia 24/25

Seleksi Lomba Kimia 24/25

Assessment

Quiz

Chemistry

1st Grade

Practice Problem

Hard

Created by

Evelin Arriesta

Used 3+ times

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Sebanyak 1,50 g sampel suatu bijih yang mengandung perak dilarutkan. Semua Ag yang
larut diubah menjadi 0,124 g Ag
2S. Persen massa Ag dalam bijih tersebut adalah.... (Ar Ag=108, S=32 g/mol)

4,15%

6,41%

7,20%

8,27%

10,8%

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Di antara senyawa oksida nitrogen berikut ini, yang mengandung 36,4% massa oksigen
adalah .... (Ar O=16, N=14 g/mol)

NO

N2O

N2O3

N2O4

N2O5

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Lebih cepat dan kurang endotermis

Lebih cepat dan sangat eksotermis

Lebih cepat dan lebih endotermis

Lebih lambat dan kurang endotermis

Lebih lambat dan lebih endotermis

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Perhatikan proses reaksi berikut ini:

2 A→ ½ B + C                                          ΔH = 5 kJ/mol

3/2 B + 4 C → 2 A + C + 3 D                   ΔH = -15 kJ/mol

E + 4 A → C                                             ΔH = 10 kJ/mol

Hitunglah ΔH untuk reaksi : B + 3C → E + 6D

0 kJ/mol

-20 kJ/mol

10 kJ/mol

20 kJ/mol

-10 kJ/mol

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Menaikkan konsentrasi A

Menaikkan konsentrasi B

Menaikkan konsentrasi C

Menambah katalis kedalam campuran reaksi

Temperatur reaksi dinaikkan

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

3,65

14,20

28,40

56,80

85,20

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Di antara senyawa berikut ini yang kelarutannya paling besar di dalam air adalah

MnS , Ksp = 2,3 × 10-13

CoCO3 , Ksp = 1,0 × 10-10

Fe(OH)2 , Ksp = 7,9 × 10-16

Ag2CrO4 , Ksp = 1,2 × 10-12

Al(OH)3, Ksp = 1,2 × 10-33

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