
pretes pm 1
Authored by heri handoko
Chemistry
3rd Grade
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5 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Perhatikan percobaan tabung sinar katoda berikut:
Seberkas elektron bergerak melintasi pelat bermuatan negatif. Ketika elektron mendekati pelat, partikel tersebut dibelokkan menjauhi pelat. Apa yang akan terjadi jika percobaan di ulangi dengan berkas proton atau neutron ….
Neutron dibelokkan menjauhi pelat bermuatan positif
Neutron dibelokkan menjauhi pelat bermuatan negative
Proton dibelokkan menjauhi pelat bermuatan positif
Proton dibelokkan menjauhi pelat bermuatan negative
Proton dan neutron tidak dibelokkan oleh kedua jenis pelat
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Diketahui 4 macam ion poli atom:
(1) NH4+
(2) SO42-
(3) NO3-
(4) PO43-
Jika ion-ion tersebut berikatan , rumus dan nama senyawa yang terbentuk adalah….
NH4(NO3)2, amonium dinitrat
(NH4)2SO4, amonium sulfat
NH4(SO4)2, amonium sulfat
(NH4)2 PO4, amonium fosfat
(NH4)2NO3, diamonium nitrat
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Soda kue (natrium bikarbonat) jika dipanaskan bersama dengan adonan kue akan menghasilkan gas CO2 yang berfungsi mengembangkan adonan kue, natrium karbonat dan uap air. Persamaan reaksi yang tepat adalah….
NaHCO3(s) →NaCO3(s) + CO2(g) + H2O(l)
2NaHCO3(s) →Na2CO3(s) + CO2(g) + H2O(l)
Na2CO3(s) + CO2(g) + H2O(l) → NaHCO3(s)
Na2CO3(s) + CO2(g) + H2O(l) → 2NaHCO3(s)
2NaHCO3 (s) →Na2CO3(s) + CO2(g) + 2H2O(l)
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Harga keempat bilangan kuantum terakhir untuk atom adalah…
n = 3, l = 0, m = -1, s = + ½
n = 3, l = 0, m = +1, s = - ½
n = 3, l = 1, m =+1, s = + ½
n = 3, l = 2, m = 0, s = - ½
n = 3, l = 1, m = 0, s = - ½
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Tabel berikut berisi rumus senyawa dan nama senyawa kimia:
Pasangan yang tepat antara rumus senyawa dan nama senyawa adalah… .
(1) dan (2)
(1) dan (3)
(1) dan (4)
(2) dan (3)
(2) dan (5)
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