Тест по химии

                                                                 12-variant

1. 10^oC temperaturada 50 gr suvda 80 gr AgNO₃ eritilib to’yingan eritma hosil qilindi.Shu temperaturada AgNO₃ ning eruvchanlik koefitsentini toping?                                                        A)100                   B)160                        C)170                       D)80

2. Sis-1,4 poliizopren namunasidagi orbitallar soni 1800∙NA. Ushbu fragnemtning massasini (g) hisoblang.                                                                                                                                                                           A) 17000                 B) 1360                         C) 20400               D) 23800

3. Titrlari bir xil bo’lgan qaysi kislota eritmasining molyar konsentrasiyasi eng kichik bo’ladi?                                                                                                                                                                   A) sulfat               B) perxlorat                  C) nitrat                   D) xlorid

4. 8,96 litr alkan va alkin aralashmasi bromli suv orqali o`tkazilganda idish massasi 12 gr ga ortadi. Hajmi 4 marta kamayadi. Alkinni toping?                                                                        A) C₃H₄           B) C₂H₂                       C) C₄H₆                   D) C₆H₁₀

 5.  16,6 gr alyuminiy va kadmiy aralashmasi HNO₃ bilan reaksiyasi natijasida 9,2 gr NO₂ gaz chiqdi. Dastlabki aralashmadagi alyuminiyning massasini hisoblang?                                                 A) 10,8 gr              B) 5,4 gr                      C) 2,7 gr                  D) 10,8 gr

6. Bir asosli karbon kislota tarkibidagi 20 ta sp³ gibridlangan orbitallar mavjud bo`lsa, karbon kislotani aniqlang ?                                                                                                                         A) C₄H₉COOH      B) CH₃COOH               C) C₂H₅COOH       D) C₃H₇COOH

7. 80 gr NaOH bo`lgan 1080gr eritmaning molyal (mol/kg) ni aniqlang ?                                               A) 1                        B) 4                               C) 2                         D) 8

8. Fenol va izopropil benzolning 40 gramm aralashmasi KOH ning 200 gr 5,6% li eritmasi bilan reaksiyaga kirishadi. Dastlabki aralashmada fenolning massa ulushini aniqlang ?                                   A) 94%                  B) 23,5%                       C) 37%                   D) 47%

9. 0,6 mol Al₄C₃ va CaC₂ aralashmasi gidrolizga uchraganda, hosil bo`lgan gazlar 160 gr 10% li Br<sub>2</sub> suv orqali to`liq o`tkazildi. Al(OH)₃ ning massasini aniqlang ?                                                          A) 85,8 gr               B) 42,9                       C) 171,6                       D) 78

10. Bir atomli to`yingan spirt tarkibidagi uglerod va vodorodning kislorodga massa nisbati  1/2,75 ga teng. Shu spirtning 36 gr miqdori Na bilan ta`sirlashadi.Reaksiyada hosil bo’lgan vodorod massasini aniqlang ?                                                                                                                        A) 1  gr            B) 2 gr                         C) 1,2 gr                   D) 0,6 gr

11. 3 gektarga 32 gr N₂ solinishi kerak bo`lsa, qancha gr mochevina kerak bo`ladi ?                            A) 68,6                   B) 58,6 gr                      C) 56 gr                  D) 28 gr

12. Teng hajmda olingan vodorod propin va propendan iborat aralashma Ni katalizatori ishtirokida ta`sirlashdi. (faqat alkan hosil bo`ladi). Dastlabki gazlar aralashmasining o`rtacha molekulyar massasini toping ?                                                                                                                                        A) 42                      B) 40                             C) 41,33                 D) 38

13. 1mol rux nitrat parchalanganda hosil bo'lgan gazlarning o'rtacha molekulyar massasini toping ?                                                                                                                                                           A) 36                     B) 43,2                           C) 44                       D) 42                            

14.    X va Y elementlardan hosil bo'lgan ikki birikmaning hosil bo'lishida sarflangan moddalar massasi keltirilgan jadvalga asoslanib n∙m qiymatini aniqlang.

A) 12                    B)20                      C)60                     D)30

15. Tarkibida CuSO₄ va AgNO₃ bo`lgan 400 ml eritmasi elektroliz qilinganda,anodda 6,4 gr O<sub>2</sub> va har 2 metalldan hammasi bo`lib 0,6 mol ajralib chiqdi. Boshlang`ich aralashmadagi AgNO₃ ning massasini toping ?                                                                                                                        A) 170 gr             B) 85 gr                            C) 68 gr                   D) 340           

16. KMnO₄ KOH ishtirokida H₂O₂ bilan ta`sirlashganda 2,24 litr (n.sh) gaz ajraldi. Reaksiyada qatnashgan oksidlovchini massasi (gr) hisoblang ?                                                                                  A) 31,6 gr            B) 15,8 gr                        C) 63,2 gr                D) 7,4 gr

17. Normal sharoitda suyuq agregat holatda bo`ladigan yagona metallmasni toping ?                       A) xlor                 B) yod                              C) brom                  D) ftor

18. Vodorodga nisbatan zichligi 14 ga teng bo`lgan noma`lum alkenning 2,8 gr miqdorini to`yintirish uchun qanday massadagi H₂ sarflanadi ?                                                                            A) 1gr                  B) 0,4 gr                          C) 0,5 gr                  D) 0,2 gr

19. Taxir tuz tarkibidagi H₂O ning massa ulushini toping ?                                                                         A) 25,6%             B) 51,2 %                       C) 32%                     D) 64%

20. 0,1 mol noma`lum alken yondirildi. Bunda 67,2 litr havo sarflandi, Alkenni toping ?      (havo tarkibida 20% O₂ bor)                                                                                                                                   A) C₂H₄               B) C₄H₁₀                        C) C₄H₈                     D) C₂H₆

21. Temir. mis va oltindan iborat aralashmaga xlorid kislota ta ’sir ettirilganda eritma massasi 2,7 g ga ortdi. Erimay qolgan qoldiq konsentrlangan sulfat kislota bilan ishlanganda 1,12 l  (n.sh.) gaz ajraldi. Qolgan qoldiq massasi 4,0 g ni taslikil etdi. Dastlabki aralashmadagi temirning massa ulushini (%) toping ?

A) 28                   B) 40                              C) 56                        D) 20

22. Mol nisbati 2;4;1 bo`lgan Al, Cu va Ag dan iborat aralashma xlorid kislotada eritmasida eritilganda olingan gaz hajmi xuddi shunday miqdordagi aralashmaning konsentrlangan nitrat kislota bilan ishlanganda olingan gaz hajmidan 6.72 litr ga kam bo`ldi. Dastlabki aralashmadagi misning massasini aniqlang ?

A]25.6                  B]32                               C]12.8                     D]6.4

23. 0,2 kg 40%li mis (II)-sulfat eritmasi massalari 18 g dan bo‘lgan ko‘mir elektrodlar ishtirokida to`liq elektroliz qilindi. Elektrolizdan so`ng katod ajratib olinib konsentrlangan sulfat kislota eritmasida eritilganda necha mol gaz(lar) ajraladi?

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

24. 20%li Na₂SO₄ eritmasi bug`latilib 32,2 g glauber tuzi (Na<sub>2</sub>SO<sub>4</sub> ∙10H<sub>2</sub>O) olingan bo‘lsa, bug`latilgan suv massasini (g) aniqlang ?

A) 25                     B) 18                           C) 56,8                        D) 38,8

25. 172 g 10%li KOH eritmasi 8 F tok bilan elektroliz qilinganda necha foizli eritma hosil bo‘ladi?

A) 15,8                 B) 16,4                          C) 17,2                      D) 28,4

26. 200 ml (p=1.3 g/ml) NaNO₃ eritmasiga 116 g suv qo‘shib 8 A tok kuchi bilan 13.4 soat elektroliz qilinganda, 10%li eritma hosil bo’ldi. Dastlabki eritmaning molar konsentratsiyasini (M) aniqlang ? (elektrodlar inert).

A) 2                       B) 4                              С) 1                            D) 3

27. Massa jihatdan 17.6%FeS, 24%FeS₂ va qolgani qo`shimcha jismdan iborat mineral tarkibidagi oltingugurtning massa ulushini aniqlang.[qo`shimcha jins tarkibida oltingugurt mavjud emas]

A) 22.4                    B) 19.2                        C) 12.8                         D) 16

28. 1/2 mol alyuminiy va 3/10 mol   fosfor havosiz sharoitda qizdirildi.Hosil bo`lgan aralashma xlorid kislota eritmasida eritilganda necha litr gazlar hosil bo`ladi ?

[AlP+3HCl=AlCl₃+PH₃]

A)8.96                     B) 11.2                     C) 6.72                            D) 13.44

29. 34.8 g K₂SO₄  3.2 mol suvda eritilganda tarkibida 3,74∙ N_A ta molekula va ion tutuvchi eritma hosil bo‘ldi.Dissotsiatsiyalanish darajasini aniqlang ? (suvning dissotsiatsiyalanishini hisobga olniang).

A) 0,7                       B) 0,6                      C)0,85                           D) 0,5

30. 0,1 kg 41,2%li natriy bromid eritmasining ma’lum qismi elektroliz qilindi. Hosil bo‘lgan eritmaga kumush nitrat eritmasi quyilganda umumiy miqdori 0.25 mol bo‘lgan cho‘kmalar (AgBr, Ag₂O) ajraldi. Elektroliz uchun sarflangan faradey tok miqdorini aniqlang ?

(2NaOH + 2AgNO₃ → 2NaNO₃ + Ag₂O↓ + H₂O)

A) 0,1F                    B) 0,15F                    C) 0,3F                         D) 0,2F