30 talik test

30 talik test

11th Grade

30 Qs

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30 talik test

30 talik test

Assessment

Quiz

Chemistry

11th Grade

Practice Problem

Medium

Created by

Bobomurod Abdixashimov

Used 1+ times

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30 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

  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 X24 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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