I – kimyodan asosiy tushunchalar

Variant – 2005

1. (102-17). 1,5 ta alumniy atomining massasini (g) hisoblang.

A) 6,73∙10^-23 B) 27 C) 40,5
D) 2,7 E) 67,27^-23

2. (107-17). 1 mol azotda 6,02∙10²³ ta molekula bo’ladi. Azot atomining massasini (g) hisoblang.

A) 2,32∙10^-23 B) 6,02∙10²³ C) 28
D) 4,65∙10^-23 E) 3,8∙10^-23
3. (122-17). 2,86 g dimetilizopropilamin - (CH₃)₂NCH(CH₃)₂ tarkibidagi vodorod atomlari soni – ……
A) 2,43 ∙10²³ B) 2,57 ∙10²³ C) 3,74 ∙10²²
D) 7,9 ∙10²³ E) 9,5 ∙10²³

4. (110-17). 200 ta kislorod atomining massasi necha gramm bo’ladi?

A) 1,66∙10^-24 B) 6,61∙10^-22 C) 5,31∙10^-21
D) 2,65∙10^-23 E) 26,56∙10^-24

5. (111-17). Xlor molekulasining massasini (g) toping.

A) 35,5 B) 107,5 C) 5,9∙10^-23
D) 71 E) 11,8∙10^-23

6. (112-17). Bir dona xrom atomining massasi necha kilogramm bo’ladi ?

A) 6,38∙10^-25 B) 6,83∙10^-27 C) 8,63∙10^-26
D) 8,36∙10^-26 E) 3,68∙10^-24

7. (116-17). 8 ta fransiy atomining massasini (g) hisoblang.

A) 2,78 ∙10^-21 B) 2,78 ∙10^-23 C) 2,96 ∙10^-21
D) 4,82 ∙10^-23 E) 1,784 ∙10^-26

8. (125-17). Ming dona vodorod molekulasining massasi necha kilogramm bo’ladi?

A) 1,67 ∙10^-25 B) 3,32 ∙10^-24 C) 4,32 ∙10^-27
D) 3,23 ∙10^-23 E) 2,33 ∙10^-26
Variant – 2006.

1. (101-1). 2 mol glukon kislota – C₆H₁₂O₇ va 3,5 mol karbonat angidrid tarkibidagi kislorod atomlari o’zaro qanday nisbatda bo’ladi?

A) 2 : 1 B) 2 : 3,5 C) 1,5 : 3,5 D) 1:1
2. (101-14). Agar oqsil massasining absolyut massasi 83,35 ∙10^-24 kg ga teng bo’lsa, uning nisbiy molekulyar massasini hisoblang. (m(1/12 C) = 1,667 ∙10^-27 kg)
A) 50 B) 180000 C) 50000 D) 1800
3. (102-18). Teng hajmli ikkita kolbaning birini toluol, ikkinchisini suv bilan to’ldirishga 25,3·10²² toluol va 15,05∙10²³ suv molekulalari sarflansa, toluolning zichligini (g/ml) hisobiang.
A) 0,86 B) 0,59 C) 0,67 D) 0,73

4. (103-1). 54,5 g aluminiy digidroksosulfat – [Al(OH)₂]₂SO₄ ……. ta atomdan tashkil topgan.

A) 1,5 ·10²³ B) 0,25 ·10²⁴
C) 6,02 ·10²³ D) 2,25 ·10²⁴

5. (103-26). Mis va ruxdan iborat 120 g qotish-madagi misning massa ulushi 60% bo’lsa, unga necha gramm rux qo’shilganda Cu₃Zn₅ tarkibli qotishmaga aylanadi?

A) 122 B) 140 C) 92 D) 74

6. (104-1). 140 g temir (III) gidrofosfat – Fe₂(HPO₄)₃ ……. ta atomdan tashkil topgan.

A) 4,21·10²⁴ B) 0,35·10²³
C) 1,02·10²⁴ D) 6,02·10²³

7. (104-18). Tarkibi faqat uglerod va vodorod atomlaridan iborat bo’lgan moddaning nisbiy molekular massassi 44 ga teng. Uning molekular formulasini aniqlang.

A) C₃H₈ B) C₂H₆ C) C₂H₅OH D) CO₂

8. (105-2). 175,5 g temir(III)-digidrofosfat – Fe(H₂PO₄)₃ ……. ta atomdan tashkil topgan.

A) 6,7 ·10²⁴ B) 3,01 ·10²³
C) 6,02 ·10²⁴ D) 0,5 ·10²⁴

9. (105-26). Mis va oltindan iborat 70 g qotishmadagi misning massa ulushi 80% bo’lsa, unga necha gramm oltin qo’shilganda Cu₃Au tarkibli qotishmaga aylanadi?

A) 50,65 B) 43,47 C) 49,35 D) 30,65

10. (106-18). 1,8 kg suvda 250 g mis kuporosi – CuSO₄ ∙ 5H₂O ertilishidan hosil bo’lgan eritmadagi suv molekulalarining sonini toping.

A) 30,1∙10²³ B) 6,02∙10²⁵
C) 6,32∙10²⁵ D) 1,8∙10²⁴

11. (108-18). Bir xil hajmli ikkita kolbaning birini metan kislota, ikkinchisini suv bilan to’ldirishga 10,05 ∙10²³ kislota va 21,07 ∙10²³ suv molekulalari sarflandi. Kislotaning zichligini (g/ml) hisoblang.

A) 1,22 B) 0,98 C) 1,36 D) 1,18

12. (109-1). 2 mol glukoza – C₆H₁₂O₆ va 3 mol karbonat angidrid tarkibidagi uglerod atomlari soni o’zaro qanday nisbatda bo’ladi?

A) 2 : 3 B) 4 : 1 C) 1 : 1 D) 3 : 2
13. (109-12). 408 g kremniy(IV) oksid tarkibida necha gramm kremniy borligini hisoblab toping.
A) 23,6 B) 120,4 C) 60,8 D) 190,4

14. (111-26). Natriy va qalaydan iborat 200 g qotishmadagi natriyning massa ulushi 20,5% bo’lsa, unga necha gramm qalay qo’shilganda Na₂Sn₃ tarkibli qotishmaga aylanadi?

A) 92 B) 41 C) 212 D) 159
15. (112-18). Teng hajmli ikkita kolbaning birini benzol, ikkinchisi-ni suv bilan to’ldirishga 5,54∙10²³ ta benzol – C₆H₆ va 27,09∙10²³ ta suv molekulalari sarflansa, benzolning zichligini (g/ml) hisoblang.
A) 0,89 B) 0,65 C) 0,72 D) 0,93

16. (113-26). Mis va oltindan iborat 80 g qotishmadagi misning massa ulushi 65% bo’lsa, unga necha gramm oltin qo’shilganda Cu₃Au tarkibli birikma olinadi?

A) 25,3 B) 52,3 C) 43,5 D) 23,4

17. (115-18). Quyidagi moddalarning har biridan 1 mol miqdorda olinganda, qaysi moddaning massasi eng og'ir bo’ladi?

A) glukoza B) osh tuzi
C) bertole tuzi D) saxaroza

18. (116-18). 342 g magniy sulfat kristallogidratida tuz molekulalarining suv molekulalariga nisbati 1:6 bo’lsa, undagi kislorod atomlari sonini toping.

A) 27,5 B) 9,03∙10²⁴
C) 17,5∙10²¹ D) 15∙10²³

19. (118-18). Molekular og'irliklari yig'indisi eng katta bo’lgan moddalar qatorini ko’rsating.

A) ammiak, azot(IV) oksid, vodorod
B) suv, metan, azot(IV) oksid
C) azot(II) oksid, suv, azot(IV) oksid
D) suv, ammiak, metan

20. (120-26). Oltin va misdan iborat 50 g qotishmadagi misning massa ulushi 80% bo’lsa, unga necha gramm oltin qo’shilganda Cu₃Au tarkibli qotishmaga aylanadi?

A) 27 B) 40 C) 50 D) 31