SUMATIF AKHIR SEMESTER OLIMPIADE KIMIA (PAKET 2)
Quiz
•
Chemistry
•
10th Grade
•
Practice Problem
•
Easy
laila maghfiroh
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25 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
Bila dalam kesetimbangan dilakukan aksi, maka sistem akan mengadakan reaksi dengan mengurangi pengaruh aksi tersebut. Pernyataan tersebut dikemukakan oleh ....
A. Fritz Haber
B. Carl Bosch
C. Wihelm Ostwald
D. Henri Louis Le Chatelier
E. Lavoisier
2.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
Suatu reaksi kesetimbangan:
2CO(g) + O2(g) ⇌ 2CO2(g) ΔH = –x kJ/mol
Agar kesetimbangan bergeser ke kanan, hal-hal di bawah ini perlu dilakukan, kecuali ....
A. pada suhu tetap, konsentrasi gas CO ditambah
B. pada suhu tetap, tekanan sistem diturunkan
C. pada suhu tetap, volume diturunkan
D. pada suhu tetap, konsentrasi gas oksigen ditambah
E. suhu diturunkan
3.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
Dari reaksi kesetimbangan berikut, bila volume sistem diubah, maka yang tidak mengalami pergeseran kesetimbangan adalah ....
A. 2SO2(g) + O2(g) ⇌ 2SO3(g)
B. N2(g) + 3H2(g) ⇌ 2NH3(g)
C. H2(g) + Cl2(g) ⇌ 2HCl(g)
D. 2N2(g) + O2(g) ⇌ 2N2O(g)
E. H9(g) + CO2(g) ⇌ H2O(g) + CO(g)
4.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
Reaksi kesetimbangan hidrolisis ester sebagai berikut.
C2H5COOCH3(aq) + H2O(l) ⇌ CH3OH(aq) + C2H5COOH(aq)
Hal berikut ini memenuhi kaidah pergeseran kesetimbangan, kecuali ....
A. penambahan CH3OH dapat menambah C2H5COOCH3
B. pengambilan CH3OH dapat menambah C2H5COOH
C. pengambilan C2H5COOCH3 dapat menambah CH3OH
D. penambahan air menyebabkan C2H5COOH bertambah
E. penambahan C2H5COOCH3 dapat menambah CH3OH
5.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
Agar reaksi CCl4(g) ⇌ C(g) + 2 Cl2(g) cepat mencapai keadaan kesetimbangan, perlakuan sebaiknya adalah ....
A. pada suhu tetap, volume diperbesar
B. pada suhu tetap, tekanan diperbesar
C. ditambah katalisator
D. pada suhu tetap, konsentrasi CCl4(g) diperbesar
E. pada suhu tetap, konsentrasi CCl4(g) dikurangi
6.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
Dalam ruang tertutup terdapat reaksi kesetimbangan:
H2(g) + Cl2(g) ⇌ 2HCl(g) ΔH = –92 kJ/mol
Jika suhu dinaikkan, maka kesetimbangan akan bergeser ke arah ...
A. kiri, harga K bertambah
B. kiri, harga K berkurang
C. kiri, harga K tetap
D. kanan, harga K bertambah
E. kanan, harga K tetap
7.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
Agar dapat diperoleh gas HBr sebanyak-banyaknya sesuai reaksi:
H2(g) + Br2(g) ⇌ 2HBr(g) ΔH = +25 kJ/mol
dapat ditempuh dengan cara ....
A. pada suhu tetap, volume diperbesar
B. pada suhu tetap, tekanan diperkecil
C. suhu diperbesar
D. suhu dikurangi
E. pada suhu tetap, ditambah katalisator
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