UTBK KIMIA
Quiz
•
Chemistry
•
12th Grade
•
Hard
Yetty Ponirosewati
Used 158+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Nilai potensial reduksi beberapa ion diberikan di bawah ini.
Cu2+(aq) + 2e- -> Cu(s) Eo = +0,340V
2H+(aq) + 2e- -> H2(g) Eo = 0,000V
Pb2+(aq) + 2e- -> Pb(s) Eo = -0,126V
Fe2+(aq) + 2e- -> Fe(s) Eo = -0,830V
Manakah yang menghasilkan Eosel terbesar?
Fe2+(aq) + Cu(s) -> Fe(s) + Cu2+(aq)
2H+(aq) + Pb(s) -> H2(g) + Pb2+(aq)
Cu2+(aq) + H2(g) -> Cu(s) + 2H+(aq)
Cu2+(aq) + Pb(s) -> Cu(s) + Pb2+(aq)
Pb2+(aq) + Fe(s) -> Pb(s) + Fe2+(aq)
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Pemanasan alkohol dengan katalis H2SO4 menghasilkan senyawa dietil eter. Apakah hasil yang diperoleh jika alkohol tersebut direaksikan dengan KmnO4 berlebih pada suasana basa?
propanal
asam metanoat
aseton
asam etanoat
etena
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui energi ikat rata-rata sebagai berikut:
H–H = 104 kkal/mol
Cl–Cl = 58 kkal/mol
H–Cl = 103 kkal/mol
Kalor yang diperlukan untuk menguraikan 182.5 gram HCl (Ar H = 1, Ar Cl = 35.5) menjadi unsur-unsurnya adalah . kkal.
44
88
220
110
132
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Suatu senyawa organik tersusun atas 40% karbon (Ar = 12), 6,6% hidrogen (Ar = 1) dan sisanya oksigen (Ar = 16). Senyawa ini memiliki Mr = 180. Jumlah atom karbon (L = 6,02 x 1023) yang terkandung dalam 0,01 mol senyawa organik tersebut adalah ….
3,6 x 1021
4,8 x 1022
1,2 x 1023
3,6 x 1022
4,8 x 1023
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Pernyataan yang benar tentang HF, HCl, dan HBr adalah ….
HF merupakan asam terkuat karena keelektronegatifan F paling tinggi
titik didih HF tertinggi karena antarmolekulnya terjadi ikatan hidrogen
HBr merupakan asam terlemah karena ikatan H-Br paling lemah
NaF garam paling basa karena Kb F paling besar
HF merupakan asam terlemah karena paling mudah melepas proton
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Larutan A dibuat dengan mencampurkan 0.1 mol NaI (Ar Na=23, I=127) dan 0.05 mol CaI2 (Ar Ca=40) dalam 500 g air. Kedua garam ini terdisosiasi sempurna dalam air. Larutan B dibuat dengan melarutkan 84 g urea (Mr = 60) dalam 1 kg air. Perbandingan penurunan titik beku larutan A terhadap penurunan titik beku larutan B adalah ....
4 : 1
3 : 1
2 : 1
1 : 1
1 : 2
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Ada reaksi berikut (kondisi asam):
KIO3(aq) + KI(aq) -> I2(aq) + K+(aq)
Jika mol kalium iodat (V) yang diperlukan adalah 1.5 mol, berapakah mol iodine yang dihasilkan?
1.5 mol
3 mol
4.5 mol
6 mol
9 mol
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