PERSIAPAN KSM KIMIA 2020
Quiz
•
Chemistry
•
10th - 12th Grade
•
Practice Problem
•
Hard
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20 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Di antara unsur berikut, yang dapat membentuk ion bermuatan +2 dengan
konfigurasi elektron 1s22s22p63s23p6 3d9 adalah ....
Cu
Ni
Sr
Mg
Zn
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Di antara serial bilangan kuantum berikut, yang menjelaskan elekron terakhir pada konfigurasi [Ar]4s23d9 adalah
n = 2, l = 1, m =1, s= +1/2
n = 3, l = 2, m =2, s= -1/2
n = 2, l = 1, m =1, s= -1/2
n = 3, l = 2, m =1, s= -1/2
n = 3, l = 2, m =0, s= +1/2
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Urutan yang benar mengenai peningkatan ukuran radius ion Li+, Be2+, dan B3+ adalah ....
Li+ < Be2+ < B3+
Be2+ < B3+ < Li+
B3+ < Li+ < Be2+
Li+ < B3+ < Be2+
B3+ < Be2+ < Li+
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Di antara molekul atau ion berikut ini: SO3, CO2, NO2+, dan ClO2-, yang isoleketronik adalah ....
SO3 dan CO2
NO2+ dan ClO2-
CO2 dan NO2+
SO3 dan NO2+
CO2 dan ClO2-
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Di antara kelompok senyawa berikut ini, yang merupakan senyawa ionik adalah....
NH4Cl , NaCl, Na2O2
NCl3, NaCl, CaC2
NF3, (NH4)2SO4, PCl3
AsH3, AlCl3, PCl3
N2O4, NH3, NH4Cl
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Perhatikan persamaan reaksi berikut :
MO2(s) + HNO3(aq) → M(NO3)2(s) + H2O(l) + O2(g)
Sebanyak 2,39 g MO2 direaksikan dengan HNO3 berlebih menghasilkan 112 mL gas O2 (1 mol gas= 22,4 L).
Jika diketahui Ar N= 14 dan O= 16, Ar M adalah ….
108
119
197
207
223
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Asam Nitrat, HNO3, dibuat dengan mereaksikan 460 gram NO2, 192 g O2 dan 180 g H2O.
Reaksi berlangsung menurut persamaan reaksi berikut :
NO2(g) + O2(g) + H2O -> HNO3
Pernyataan yang tidak benar adalah ....
Jika reaksi berlangsung sempurna, maka 10 mol NO2 berubah menjadi 510 g HNO3
NO2 merupakan pereaksi pembatas
Air terdapat dalam jumlah berlebih
Pada proses ini dihasilkan 610 g HNO3
Pada akhir reaksi terdapat sisa oksigen 90 g
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