
UAS Kelas 11 Kimia
Quiz
•
Chemistry
•
11th Grade
•
Hard
Rasty Syem
Used 2+ times
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40 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Kecepatan penurunan atau peningkatan konsentrasi reaktan seiring waktu adalah...
Suhu
Konsentrasi reaktan
Luas permukaan
Katalis
Kecepatan reaksi
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Air dalam wadah tertutup pada suhu konstan akan menguap dan kemudian uap tersebut akan mengembun, mencapai keseimbangan. Pernyataan berikut berkaitan dengan keseimbangan ini: (1) ada perubahan makroskopis, (2) ada perubahan mikroskopis, (3) laju penguapan sama dengan laju pengembunan, (4) itu tidak terjadi secara spontan karena berada dalam sistem tertutup. Pasangan pernyataan yang benar tentang keseimbangan fase ini adalah...
(1) dan (3)
(1) dan (4)
(2) dan (4)
(2) dan (3)
(3) dan (4)
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Amati reaksi kesetimbangan berikut! H(g) + I(g) ⇄ 2HI(g) ΔH = +25,94 kJ. Jika volume dikurangi, arah kesetimbangan akan...
Bergeser ke kiri karena reaksi bersifat endotermik
Tetap tidak berubah karena tidak terpengaruh oleh perubahan volume
Bergeser ke kanan karena reaksi bersifat endotermik
Bergeser ke kanan karena jumlah molekul lebih sedikit
Bergeser ke endotermik karena reaksi menyerap panas
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Equilibrium reactions occur in the mouth. Tooth enamel contains calcium hydroxylapatite Ca5(PO4)3OH. Under certain conditions, this substance can reach equilibrium as follows: Ca5(PO4)3OH(s) ⇌ 5Ca(aq) + 3PO(aq) + OH(aq). If someone frequently consumes acidic food or drinks, the enamel will become porous. This occurs because the equilibrium shifts towards...
Left and the amount of Ca5(PO4)3OH decreases
Right and the amount of Ca5(PO4)3OH decreases
Left and the amount of Ca5(PO4)3OH increases
Right and the amount of Ca5(PO4)3OH increases
Right and the amount of OH decreases
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Dalam sebuah wadah tertutup dengan volume 1 liter, 6 mol gas NH diperkenalkan. Setelah beberapa waktu, keseimbangan terjadi: 2 NH(g) ⇄ N(g) + 3H(g). Jika pada keseimbangan terdapat 2 mol N dan tekanan total 8 atm, nilai K dari reaksi tersebut adalah...
0.04 atm
69.12 atm
3.00 atm
110.59 atm
0.014 atm
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Dalam reaksi N(g) + O(g) ↔ 2NO(g), nilai Kc adalah 2,5 x 10^-29. Nilai Kc untuk reaksi NO(g) ↔ ½N(g) + ½O(g) dalam kondisi ini adalah...
2 x 10^2
1 x 10
5 x 10
5 x 10
2 x 10
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Dalam reaksi kesetimbangan berikut: 6 NO + 4 NH ⇄ 5 N + 6 HO; ΔH = -X kJ. Jika suhu diturunkan pada volume konstan, sistem kesetimbangan akan bergeser ke...
Kiri, konsentrasi NO meningkat
Kanan, konsentrasi N tetap konstan
Kanan, konsentrasi N menurun
Kanan, konsentrasi N meningkat
Kiri, konsentrasi NO menurun
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