PEKAN PENILAIAN kimia CISAAT
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Hard
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20 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
1. Suatu larutan gliserin, C3H5(OH)3 dibuat dengan melarutkan 45 gram senyawa tersebut dalam 100 gram air, jika Ar C= 12, O = 16 dan H = 1 maka molalitas gliserin dalam larutan tersebut adalah….
8,01
4,89
3,10
0,31
0,081
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Tekanan uap jenuh air murni pada suhu
300 C adalah 31,8 mm Hg. Jika fraksi mol air 0,6, maka penurunan tekanan uap jenuh larutan tersebut adalah….
3,18 mmHg
9,54 mmHg
12,72 mmHg
19,08 mmHg
25,44 mmHg
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Sebanyak 6 gram urea (Mr = 60) dicampur dengan 27 gram air (Mr = 18). Jika tekanan uap air pada suhu tersebut sama dengan 32 mmHg, maka tekanan uap jenuh larutan
adalah….
30 mmHg
28 mmHg
26 mmHg
20 mmHg
10 mmHg
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sebanyak 45 gram glukosa (Mr = 180) dilarutkan ke dalam 100 gram air. Jika Kb air = 0,52 0C/molal, maka titik didih larutan glukosa tersebut adalah….
1,040 C
1,30 C
100,520 C
101,30 C
100,520 C
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Penurunan titik beku larutan 28 % berat KOH , Mr = 56, di mana Kf air 1,80C/m adalah….
-25,8 0C
-12,5 0C
12,5 0C
25,8 0C
50 0C
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Larutan 0,1 molal berikut yang memiliki titik beku terendah adalah….
CO(NH2)2
Al2(SO4)3
FeCl3
Na2SO4
KBr
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Suatu sel Volta terdiri dari elektrode seng dan tembaga. Pernyataan yang benar dari sel di atas, adalah ....
Tembaga bertindak sebagai anode
Pada seng terjadi reaksi reduksi
seng sebagai elektrode positif
Diagram selnya : Cu/Cu2+ //Zn2+ /Zn
Reaksi sel: Zn + Cu2+ → Zn2+ + Cu
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