
Quiz (PLBT)
Authored by Abdul Kadir
Science
University
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
Yang benar terkait komposisi padatan dalam sistem Tanah, Air dan Udara adalah:
Padatan Tanah < Padatan Udara
Padatan Air < Padatan Udara
Padatan Tanah = Padatan Air
Padatan Air < Padatan Tanah
2.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
Reaksi kimia berikut 2 Fe + O2 + 4 H+ -> 2 Fe2+ + 2 H2O, E = 1.67 V adalah:
Pengendapan
Pelapukan
Penjerapan
Redoks
3.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
Konstanta Kesetimbangan (K) untuk reaksi kimia berikut: X-Zn + Ca2+ -> X-Ca + Zn2+ adalah:
K = [Ca2+]/[Zn2+]
K = [X-Ca][Zn2+]/[X-Zn][Ca2+]
K =[X-Ca]/[X-Zn]
K = [Zn2+]/[Ca2+]
4.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
Dalam reaksi aA + bB -> cC + Dd, jika nilai B ditingkatkan maka:
A meningkat
C menurun
D menurun
A menurun
5.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
Reaksi pelapukan berikut KAlSi3O8 + 4 H2O + 4 H+ -> K+ + Al3+ + 3 Si(OH)4 akan berjalan semakin cepat bila:
pH tanah meningkat
Kadar air tanah menurun
CO2 tanah menurun
pH tanah menurun
6.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
Dalam reaksi kimia berikut Zn2+ + 2 OH- -> Zn(OH)2, bila pH dinaikkan maka:
Reaksi pengompleksan Zn(OH)2 akan meningkat
Reaksi pengendapan Zn(OH)2 tidak terpengaruh
Konsentrasi ion Zn2+ akan bertambah
Pengendapan Zn(OH)2 akan meningkat
7.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
Reaksi kimia berikut 2 Fe + O2 + 4 H+ -> 2 Fe2+ + 2 H2O, E = 1.67 V dalam tanah tergenang akan:
Meningkat
Tak terpengaruh
Tergantung jenis tanahnya
Menurun
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