
30 talik test
Quiz
•
Chemistry
•
11th Grade
•
Practice Problem
•
Medium
Bobomurod Abdixashimov
Used 1+ times
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30 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
E → 231U + xα + -b + 5 yadro reaksiyasiga binoan 4,62 g uran hosil bo‘lganda E tarkibidagi barcha zarrachalar soni 0,56 ⦁ Na ga kamaydi. x ning qiymatini aniqlang.
4
3
2
1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
X2+ ioni tarkibidagi elektronlar soni Y3– ioni tarkibidagi elektronlar sonidan 2 taga ko‘p. Bunga ko‘ra X3– ioni tarkibidagi elektronlari soni Y atomi tarkibidagi elektronlari sonidan nechtaga ko‘p?
3
10
8
5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2A(g) + B(g) ↔ 3C(g) sistemada to‘g‘ri reaksiya tezligi υ = 3,6 mol/(l⦁min) . Agar tezlik konstantasi k1 = 0,2 l2 /(mol2⦁min) va В moddaning konsentratsiyasi 2 mol/l bo‘lsa, A modda konsentratsiyasini (mol/l) hisoblang.
3
9
4
2
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
120 g MgSO4 ning to'yingan eritmasiga 2,4 g quruq tuz qo'shilib, qizdirildi. Boshlang‘ich haroratgacha sovutilganda 4,8 gramm MgSO4 ⦁ 4H2O cho‘kmaga tushdi. Dastlabki eritma konsentratsiyasi qanday bo'lgan?
10
40
25
30
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Bariy gidroksid va bariy xlorid saqlagan 50 ml eritmada 0,1 mol xlorid va 0,075 mol bariy ionlari bo‘lsa, eritmaning pH qiymatini hisoblang.
12
11
13
14
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
. 0,25 mol X2YО4 tuzi 100 ml suvda eritildi. Tuz erishidan hosil bo‘lgan kation tarkibida 4 ∙ NA ta, anion tarkibida 10 ∙ NA ta elektron bo‘lsa, tuzni aniqlang. (α = 80%)
Na2SO4
K2SeO4
Na2SeO4
K2SO4
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Quyidagilardan qaytaruvchilik xossasi eng yuqori bo’lgan anionni ko’rsating.
O2–
Te2–
Se2–
S2–
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