7- sinf uchun Kimyodan test savollari

11. Propanning tarkibidagi uglerodning massa ulushini
toping.
A) 85 % B) 81 % C) 70 % D) 8 %
12. Alkanlarda monogalogenli xosila izomeriyasi qaysi vakilidan boshlanadi?
A) etan B) propan C) butan D) metan
13. 4 mol propandagi uglerod va vodorod atomlari ayirmasini toping.
A) 6,02*1023 B) 12,04*1023
C) 12,04*1024 D) 6,02*1024
14. Metil xlorid molekulasidagi uglerodning
oksidlanish darajasi yig’indisini toping?
A) 0 B) +1 C) +2 D) –2
15. Geptanning barcha izomerlari tarkibidagi birlamchi, ikkilamchi, uchlamchi va to’rtlamchi uglerod atomlarining soni yig’indisini toping?
A) 61 ta B) 62 ta C) 63 ta D) 64 ta
16. Neopentanning birinchi va ikkinchi uglerod
atomlarining oksidlanish darajasini toping.
A) -3,0 B) -4,-4 C) +3,+2 D) -2,-2
17. Alkan gamaloglarining dastlabki 10 ta vakilining nechtasi tasodifiy nom bilan ataladi?
A) 3 ta B) 4 ta C) 5 ta D) hech qaysisi
18. Xloroform molekulasidagi uglerodning oksidlanish darajasi yig’indisini toping?
A) 0 B) +1 C) +2 D) +3
19. 9 ta izomeri bor alkanning barcha izomerlari
tarkibidagi σ- bog’lar soni 18 ta izomeri bor alkanning barcha izomerlari tarkibidagi σ- bog’lar sonidan nechtaga kam ekanligini aniqlang.
A) 234 B) 261 C) 270 D) 252
20. Alkanlar gomologik qatorining umumiy formulasini (1,2,3,4) va kislorodda oksidlanish reaksiyasi tenglamasidagi suvning koeffitsiyentini (a,b,c,d) toping (reaksiya mahsuloti sifatida CO2 va H2O hosil bo’ldi deb
hisoblang).
1) CnH2n+2 2) CnH2n-2 3) CnH2n 4) CnH2n-6
a) n b) 1,5n+0,5 c) n+1 d) 1
A) 1-a B) 1-c C) 2-a D) 1-d
21. Sikloalkanlarning umumiy formulasi CnH2n bilan ifodalanadi. Bu formulada n ning eng kichik qiymati nechaga teng?
A) 2 B) 3 C) 4 D) 5
22. Sikloalkan molekulasidagi protonlar sonini topish formulasini ko’rsating?
A) N=8n-2 B) N=6n-2 C) N=8n D) N=8n+2