Soal Seleks OSN Kimia tingkat Sekolah
Quiz
•
Chemistry
•
University
•
Hard
Dedi Effendi
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30 questions
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1.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
Pada reaksi MnO + C2O --> Mn2+ + CO2 ( suasana asam) bila disetarakan, reaksi ionnya menjadi .....
2 MnO + 16H+ + 5 C2O --> 2 Mn2+ + 10 CO2 + 8 H2O
MnO + 8 H+ + C2O --> Mn2+ + CO2 + 4 H2O
2 MnO + 8H+ + 5 C2O --> 2 Mn2+ + 10 CO2 + 8 H2O
MnO + 16H+ + C2O --> Mn2+ + CO2 + H2O
2 MnO + 16H+ --> 2 Mn2+ + CO2 + H2O
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Jumlah proton, electron, dan neutron dari 11Na 23 adalah..
A. Ba + Al2(So4)3 → Al + baSO4
DF
G
V
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Nomor atom suatu unsur logam utama golongan IIIA = 13. Konfigurasi elektron paling stabil dari ion logam tersebut adalah....
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Suatu reaksi mencapai keadaan setimbang jika ….
jumlah mol reaktan dan mol produk sama
reaksi telah berhenti
massa reaktan sama dengan massa produk
salah satu reaktan telah habis bereaksi
Laju reaksi ke kanan sama dengan laju reaksi ke kiri
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
CO2 merupakan senyawa yang terdiri dari unsur apa saja?
Hidrogen dan Oksigen
Nitrogen dan Karbon
Oksigen dan Karbon
Oksigen
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
massa uranium = 235,044, massa kripton =91,92, massa barium =140,914, massa neutron =1,009... Energi yang dihasilkan adalah ... MeV
0,192
175,782
178,752
194,752
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
berikut ini adalah hal-hal yang dipelajari dari termokimia, kecuali...
mempelajari reaksi eksoterm dan endoterm
mempelajari sistem dan lingkungan
mempelajari perubahan wujud zat
mempelajari kalor reaksi
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