Davlat test markazi kimyo 2019–yil test topshiriqlari to'plami davr press nmu toshkent – 2019

YUQORI MOLEKULAR BIRIKMALAR
1. nA → (A) _n+(n–1) H₂O sxemaga binoan olinadigan polimer va uning molar massasini (g/mol) aniqlang. Polimerlanish darajasi 250.

A) kapron, 28250

B) lavsan, 48000

C) polipropilen, 10500

D) poliizopren, 17000
2. Polietilendan polipropilenning molar massasi 4,5 marta ko’p bo’lsa, ularning polimerlanish darajasi necha marta farq qiladi?

A) 6 B) 5 C) 4 D) 3

3. Butadiyen–1,3 va stirolning sopolimerlanishidan hosil bo’lgan kauchukning 73,2 g namunasi 400 g 8% li bromli suvni rangsizlantirsa, kauchukda butadiyen va stirol qanday mol nisbatda bo’lgan?

A) 3:1 B) 1:3 C) 6:1 D) 1:6

4. Quyidagi sopolimerning molekular massasi 164000 bo’lsa, uning polimerlanish darajasini aniqlang.

(–CH₂–CH₂–CH₂–CH=CH–CH₂–) _n.

A) 2000 B) 4000 C) 400 D) 200

5. Quyidagi sopolimerning molekulasida 3,2⦁10⁴ dona atom bo’lsa, uning polimerlanish darajasini aniqlang.

(–CH₂–CH₂–CH₂–CH=CH–CH₂–) _n.

A) 400 B) 2000 C) 4000 D) 200

6. Molekulasida 32000 ta atom saqlagan sopolimerning molekular massasini aniqlang.

(–CH₂–CH₂–CH₂–CH=CH–CH₂–) _n.

A) 164000 B) 32800 C) 16400 D) 328000
7. 56 g polietilen (–CH₂–CH₂–) ₂₀₀₀₀ necha mol?

A) 10^–2 B) 10^–5 C) 10^–3 D) 10^–4

8. 10^–4 mol polistirol 52 g bo’lsa, polimerlanish darajasini aniqlang.

A) 5000 B) 500 C) 4000 D) 400

9. 10^–4 mol polietilen (–CH₂–CH₂–) ₂₀₀₀₀ necha gramm keladi?

A) 56 B) 112 C) 11,2 D) 560

10. Polietilen (–CH₂–CH₂–) _n molekulasidagi asosiy uglerod zanjiri uzunligi 308 nm ga teng bo’lsa, polimerlanish darajasini aniqlang. l(C – C) = 0,154 nm.

A) 200 B) 100 C) 1000 D) 2000

11. Polietilen (–CH₂–CH₂–) _n molekulasidagi asosiy uglerod zanjiri uzunligi 308 nm ga teng bo’lsa, polimerning molekular massasini aniqlang. l(C – C) = 0,154 nm.

A) 56000 B) 28000 C) 2800 D) 5600

12. Molekular massasi 56000 bo’lgan polietilen (–CH₂–CH₂–) _n molekulasidagi asosiy uglerod zanjiri uzunligi (nm) hisoblang. l(C – C) = 0,154 nm.

A) 616 B) 308 C) 61,6 D) 30,8

13. (–CH₂–CH₂–) ₂₀₀₀₀ bo’lgan polietilen molekulasining asosiy uglerod zanjiri uzunligini (nm) hisoblang. l(C – C) = 0,154 nm.

A) 61,6 B) 616 C) 308 D) 30,8

14. Etilen polimerlanganda 100 ta (–CH₂–CH₂–) ₁₀₀ va 400 ta (–CH₂–CH₂–) ₄₀₀ hosil bo’ldi. Polimerning o’rtacha molekular massasini aniqlang.

A) 7280 B) 9520 C) 4480 D) 6720

15. 5,4 g divinilning ma’lum qismi polimerlanganda 0,00025 ⦁ N_A ta makromolekula hosil bo’ldi. Olingan reaksion aralashma 800 g 3% li bromli suvni rangsizlantirsa, polimerlanish darajasini aniqlang.

A) 200 B) 250 C) 500 C) 400

16. Izopren namunasi 80% unum bilan polimerlanganda sp³–gibrid orbitallari soni 3,2 ⦁ N_A ga ortdi. Namunadagi alkadiyen massasini (g) hisoblang.

A) 34 B) 27,2 C) 102 D) 54,4

17. Toshko’mir smolasidan olingan, qaynash harorati 170 – 230⁰C bo’lgan fraksiya haqida to’g’ri fikrni aniqlang.

A) o’rta moy, tarkibi fenol, naftalin

B) og’ir moy, tarkibi naftalin va uning gomologlari

C) antrasen moyi, tarkibi anstrasen va fenantren

D) karbol moyi, tarkibi fenollar
18. 34 g 2–metilbutadiyen–1,3 polimerlanganda sp³ – gibridlangan orbitallar soni 3,2 ⦁ N_A ga ortgan bo’lsa, polimerlanish reaksiyasi unumi (%) hisoblang.

A) 60 B) 75 C) 80 D) 85

19. Poliizopren molekulasida 2700 dona gibrid orbitallar mavjud bo’lsa, 2–metilbutadiyen–1,3 ning polimerlanish darajasini aniqlang.

A) 300 B) 200 C) 100 D) 150

20. Polimerlanish darajasi 300 bo’lgan polimerning massasi 324 g. Agar polimerlanishda 6,0 mol monomer qatnashgan bo’lsa, polimerni toping.

A) polipropilen B) divinil

C) poliizopren D) neylon
21. Molekular massasi 16968 bo’lgan kapron H–[–HN–(CH₂) _5­–CO–]_n–OH tolasining bitta makromolekulasida nechta bog’ hosil qilishda qatnashgan sp³–gibrid orbital mavjud?

A) 3452 B) 3602 C) 3302 D) 3152

22. Polipropilen tarkibidagi N(H) – N(C) = 450 bo’lsa, polimerning molekular massasini hisoblang.

A) 10500 B) 8400 C) 4200 D) 6300

23. Sis–1,4–poliizopren namunasi tarkibida sp²–gibrid orbitallar soni 1200 ⦁ N_A. Ushbu fragmentning massasini (g) hisoblang.

A) 23800 B) 17000 C) 13600 D) 20400

24. 324 g butadiyen–1,3 dan 0,02 mol butadiyen kauchuk olinsa, o’rtacha polimerlanish darajasi qanday bo’lgan?

A) 500 B) 600 C) 300 D) 400

25. Poliizopren molekular massasi 13600 ga teng bo’lsa, polimer tarkibida necha dona gibrid orbitallar mavjudligini aniqlang.

A) 3600 B) 5400 C) 4500 D) 7200

26. Trans–1,4–poliizopren molekular massasi 13600 ga teng bo’lsa, uning molekulasida necha dona vodorod atomi borligini toping.

A) 1600 B) 2800 C) 2000 D) 2400

27. Butadiyen–1,3 ning o’rtacha polimerlanish darajasi 300 bo’lsa, 405 g monomerdan necha mol butadiyen kauchuk olinadi?

A) 0,020 B) 0,025 C) 0,030 D) 0,040

28. Polietilen massasi uning tarkibidagi uglerod atomlari massasidan 800 g ga ko’p bo’lsa, polimerning o’rtacha molar massasini (g/mol) hisoblang.

A) 8400 B) 9800 C) 7000 D) 5600

29. Molekular og’irligi 17700 ga teng bo’lgan xloropren kauchukning polimerlanish darajasini toping.

A) 150 B) 250 C) 300 D) 200

30. 25,2 g propilenning polimerlanishidan hosil bo’lgan namunada 0,002 ⦁ N_A dona makromolekula bor. Reaksiyaga kirishmagan propen bromli suv orqali o’tkazilganda idish massasi 4,2 g ga ortdi. Polipropilenning polimerlanish darajasini aniqlang.

A) 350 B) 250 C) 300 D) 200

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