K imyo Ergashev Botirjon

K imyo Ergashev Botirjon

1. 0,5 mol metall karbonatida 21 mol elektron bo‘lsa, moddani aniqlang.
A) MgCO₃ B) Na₂CO₃ C) CuCO₃ D) K₂CO₃

2. Qaysi tuz eritmasi inert elektrodlar yordamida elektroliz qilinganda katodda vodorod, anodda kislorod ajralib

chiqadi?
A)KCl B)CuCl2 C)AgNO3 D)NaNO3

3. CuSO₄ eritmasiga 10 gr Fe tushirildi, bir ozdan so’ng plastinka massasi 11gr gat eng bo’ldi. Bunda qancha gr Fe eritmga o’tgan?

A) 6 B) 7 C) 6,5 D) 7,5

4. 1:2 mol nisbatda olingan ozon va kislorod aralashmasining massa nisbatini aniqlang.

A) 5:3 B) 3:4 C) 1:2 D) 1:1

5. Uglerod tabiatda erkin holda qanday ko‘rinishda uchraydi?

A) karb orund va karbin
B) olmos va grafit
C) kalsit va fulleren
D) billur va fulleren

6. pH=5 bo’lgan eritmadagi OH^- ionining konsentratsiyasini (mol/l) hisoblang.

A) 10^-5 B) 10^-9 C) 5 D) 9

7. Titri 40 mg/ml bo’lgan temir (III) sulfat eritmasining molyar konsentratsiyasi(mol/l)ni aniqlang.

A) 0,1 B) 0,3 C) 0,15 D) 0,05

8. Butlerov izomerlanish reaksiyasida qaysi moddani katalizator sifatida ishlatgan?

A) AlCl₃ B) Na C) Ca(OH)₂ D) Pd,Pt,Ni

9. Qaysi reaksiya(lar) amalda bormaydi?

1) ZnSO₄ + Fe→
2) ZnMnO₄ + Cu→
3) Zn(NO₃)₂ + Mg →
4) ZnCl₂ + Co →
A) 1,3 B) 4 C) 1,2,4 D) 3

10. Quyidagi oksidlanish-qaytarilish reaksi-yasida jami koeffisentlar yig’indisini aniq-lang. KMnO₄ + KOH + Na₂SO₃ = K₂MnO₄ + Na₂SO₄ + H₂O

A) 9 B) 8 C) 10 D) 6

11. Na₂O₂ molekulasidagi natriy va kislorod-ning oksidlanish darajasini toping.

A) -2; +2 B) +2; -1 C) +1; -1 D) +1; -2

12. Qaysi metallmas gidridining 127^oC va 83,1 kPa bosimda 6 litrida 3,612·10²³ ta atom bo’ladi? (R=8,31)

A) uglerod B) fosfor C) kremniy D) oltingugurt
13. Xlor atomidagi 17- elektron uchun kvant sonlar qiymatini ko’rsating.
A) n=3; l=2, m_l=+2 m_s=+ 0,5
B) n=3; l=1; m_l=+1 m_s=+ 0,5
C) n=3; l=1; m_l=0 m_s= -0,5
D) n=3; l=1; m_l=+1 m_s= -0,5

14. Qaysi metalldan yasalgan plastinka mis sulfat eritmasiga tushirilganda plastinkaning massasi kamayadi?

A) temir B) rux C) magniy D) alyuminiy

15. 26 g H2SO4∙0,4SO3 tarkibli oleumdan necha gramm sulfat kislota olish mumkin?

A) 20,2 B) 15 C) 18,4 D) 19,6 g

16. Qaysi qatorlarda faqat kuchli elektrolitlar keltirilgan?

1) CH₃COOH, NH₄OH, HNO₂;
2) Na₂SO₄, AlCl₃, H₂SO₄;
3) Al(OH)₃, NH₄OH, NaOH;
4) NaCl, HF, Zn(OH)₂;
5) H₂SO₃, NH₄OH, H₂CO₃;
6) CaCl₂, HNO₃, CuSO₄.
A) 1, 3, 5 B) 1, 5 C) 2, 4, 6 D) 2, 6

17. Xrom(III)sulfatning dissotsiatsiyalanma-

gan molekulalari tarkibidagi atomlar soni dissotsiatsiyalangan molekulalardan hosil bo’lgan ionlar soniga teng bo’lsa, xrom (III) sulfatning dissotsiatsiyalanish darajasini (α%) aniqlang.
A) 94,4 B) 77 C) 89 D) 85

18. Gidrolizga uchraydigan tuzlar qatorini ko'rsating.

A) KCl, Ca(NO₃)₂, Na₂S, MgSO₄
B) CaCl₂, Ba(NO₂)₂, K₃PO₄, CuS
C) NH₄NO₃, Na₂SiO₃, K₂SO₄, MgCl₂
D) NH₄Cl, CH₃COONa, K₂SiO₃, FeCl₃

19. Birinchi elektrolizerda 2 mol, ikkinchisida 3 mol mis(II) sulfat bo'lgan eritmalar orqali 5 faradey tok o'tganda katodlarda (inert elect-rod) ajralib chiqqan moddalar massalarini (g) hisoblang.

A) 129, 160 B) 128, 128
C) 192,192 D) 130, 192

20. 59,24% li (p=1,49g/sm³) sulfat kislota eritmasining normal konsentratsiyasini aniq-lang.

A) 18 B) 9 C) 27 D) 36

21. AlPO₄ ning ekvivalent massasini aniqlang.

A)64 B) 66.67 C) 122 D) 40,67

22. Kuchsiz asos bilan kuchsiz kislotadan hosil bo'lgan tuz gidrolizga uchraganda, gidrolizda qanday ionlar qatnashadi va muhit qanday bo'ladi?

A) tuzning kationi; muhit ishqoriy
B) tuzning anioni; muhit kislotali
C) tuzning kationi ham, anioni ham; muhit neytral
D) tuzning kationi; muhit kislotali

23. Quyidagi reaksiyalarning qaysilarida hajm va temperaturaning kamayishi muvoza-natni bir xil tomonga siljitadi?

1. N2(g) + O2(g) = 2NO(g) – Q
2. CO2(g) + C(g) = 2CO(g) – Q
3. 2CO(g) + O2(g) = 2CO2(g) + Q
4. CO(g) + H₂O(g) = CO₂(g) + H₂(g) + Q
5. 2SO2(g) + O2(g) = 2SO3(g) + Q
A) 1,2,3 B) 2,3,4 C) 2,3,5 D) 3,4,5

24. Rux xloratning 33°dagi eruvchanligi 75 ga teng. Shu eritmadagi tuzning konsentratsiya-sini (%) aniqlang?

A) 51,5 B) 56 C) 42,85 D) 25,6

25. 120 gramm LiOH 250 gramm suvda eritildi Hosil bo’lgan eritmasining molyal konsentratsiyasini toping.

A) 23,4 B) 30 C) 20 D) 9,75

26. Gomolog so`zining ma`nosi nima?

A) aktiv B) o`xshash
C) passiv D) noyo`nalish

27. Zanjir reaksiyalar sxemasini ishlab chiq-qan olim?

A) Butlerov B) Vyoler
C) Vyurs D) Semyonov

28. Berseliusning fanga olib kirgan terminlari qaysilar?

A) Kataliz; allortopiya; izomeriya; ekvivalent
B) Izomeriya; allortopiya; kataliz; elektroliz
C) Gidroliz; kataliz; allortopiya; elektroliz
D) Organik kimyo; izomeriya; allortopiya; ka-taliz

29. Quydagi moddalarning qaysi moddalar-ning tarkibida uchrashiga qarab juftlab ajrating.

1.karam bargi 2. petrushka bargi
3. qarag’ay daraxti 4. Bazi gullarning mumi
a-C₇H₁₆, b-C₂₉H_60, c-C₂₀H_42, d-C₂₇H_56, f-C₂₈H₅₈
A) 1-c, 2-b, 3-a, 4-d,f B) 1-a, 2-b, 3-c,f, 4-d
C) 1-b, 2-c, 3-a, 4-d,f D) 1-c, 2-b, 3-a,f 4-d

30. 0,5 M li 3 litr eritmada necha mol modda mavjud?

A) 2 B) 3 C) 1,5 D) 0,6
1. 0,5 mol metall karbonatida 21 mol elektron bo‘lsa, moddani aniqlang.