
osn kimia
Authored by Dwi Ita
Chemistry
12th Grade - University
NGSS covered
Used 151+ times

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25 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Suatu reaksi kesetimbangan:
2 CO(g) + O2(g) ⇄ 2 CO2(g) ΔH = –x kJ/mol
Agar kesetimbangan bergeser ke kanan, hal-hal di bawah ini perlu dilakukan, kecuali … .
pada suhu tetap, konsentrasi gas CO ditambah
pada suhu tetap, volume diturunkan
pada suhu tetap, tekanan sistem diturunkan
pada suhu tetap, konsentrasi gas oksigen ditambah
suhu diturunkan
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Empat unsur A, B, C, D masing-masing mempunyai nomor atom 16, 17, 18, 19. Pasangan yang dapat membentuk ikatan ion adalah...
A dengan B
A dengan C
B dengan C
B dengan D
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
52Te126 memiliki ....
126 neutron, 52 proton, dan 52 elektron
74 neutron, 52 proton, dan 52 elektron
52 neutron, 74 proton, dan 74 elektron
52 neutron, 126 proton, dan 126 elektron
74 neutron, 74 proton, dan 126 elektron
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Elektron terakhir suatu unsur mempunyai harga bilangan kuantum n =3, I = 2, m = -2, dan s = +1/2
Nomor atom unsur tersebut adalah….
20
21
22
23
24
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Unsur R mempunyai jari-jari atom lebih kecil dari- pada -unsur Q dan lebih besar daripada unsur S. Ketiganya terletak pada golongan yang berurutan dan periode yang sama. Unsur T mempunyai keelektronegatifan lebih besar daripada keelektro- negatifan unsur S. Unsur P mempunyai energi ionisasi lebih kecil daripada unsur Q. Unsur yang memiliki nomor atom paling tinggi adalah….
P
Q
R
S
T
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
1. Belerang dapat diperoleh dari gas alam dengan cara mengoksidasi gas asam sulfida sesuai persamaan reaksi berikut.
H2S(g) + O2(g) à S(s) + H2O(l)
Jika belerang yang dihasilkan sebanyak 320 gram, volume gas asam sulfida yang dioksidasi pada keadaan STP sebanyak….L (Ar S = 32)
336
224
112
56
28
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Suatu senyawa mengandung 14% hydrogen dan 86% karbon. Jika Mr senyawa = 56, rumus empiris dan rumus molekul senyawa tersebut adalah… (Ar H = 1 dan C = 12)
CH4 dan CH4
CH2 dan C2H4
C3H4 dan C3H4
CH2 dan C4H8
C2H5 dan C4H10
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