
Quiz Kimia 3
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Chemistry
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Professional Development
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Practice Problem
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Teacher Edulab
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20 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Suatu unsur memiliki bilangan kuantum elektron terakhir n = 3, l = 2, m = +1, s = +1/2 ketika membentuk ion +2. Konfigurasi elektron atom tersebut dalam keadaan dasar adalah…
1s2 2s2 2p6 3s2 3p6 3d4
1s2 2s2 2p6 3s2 3p6 3d2
1s2 2s2 2p6 3s2 3p6 3d4 4s2
1s2 2s2 2p6 3s2 3p6 3d5 4s1
1s2 2s2 2p6 3s2 3p6
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Atom dengan konfigurasi elektron [Ne] 3s2 3p2 bersifat…
logam
semilogam
nonlogam
diamagnetik
inert
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Persamaan reaksi yang menunjukkan energi ionisasi ke-2 dari magnesium adalah…
Mg (s) → Mg2+ (s) + 2e-
Mg (s) → Mg2+ (g) + 2e-
Mg (g) → Mg2+ (g) + 2e-
Mg+ (g) → Mg2+ (g) + e-
Mg+ (s) → Mg2+ (g) + e-
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Pernyataan yang benar untuk molekul HCN adalah…
memiliki geometri molekul tetrahedral
merupakan molekul yang bersifat polar
memiliki sepasang elektron bebas pada atom pusat
membentuk ikatan hidrogen jika dilarutkan dalam air
larutannya tidak menghantarkan listrik
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Suatu cairan yang sangat volatil menghasilkan 0,509 gram uap di dalam wadah bervolume 129,4 mL pada temperatur 364 K. Jika tekanan dalam wadah tersebut 746 torr, maka dapat disimpulkan cairan tersebut adalah… (Ar H = 1, C = 12, Cl = 35,5, Br = 80, I = 127)
C2H4Cl2
CH2Cl2
C2H5Br
CHCl3
CH3I
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Logam M bereaksi dengan gas halogen (X2) membentuk senyawa ionik dengan rumus empiris MX2. Senyawa MBr2 dapat diubah secara sempurna menjadi MCl2 jika direaksikan dengan Cl2 sesuai persamaan reaksi:
MBr2 + Cl2 → MCl2 + Br2
Jika 2,00 g MBr2 (Ar Br = 80) yang direaksikan dengan Cl2 menghasilkan 1,11 g MCl2 (Ar Cl = 35,5) maka massa atom relatif logam M adalah…
17,8
20,1
40,0
87,0
137,3
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Tekanan gas CO2 (Mr = 44) dalah wadah 4 L adalah 4 kali tekanan 2,3 g gas NO2 (Mr = 46) dalam wadah yang sama. Kerapatan gas CO2 dalam wadah tersebut adalah…
4,6 g/L
4,8 g/L
2,3 g/L
2,2 g/L
1,1 g/L
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