«kimyo» kafedrasi “umumiy kimyo” fanidan

TEST SAVOLLAR
1. Kaliy sulьfatning dissosilanmagan molekulalari soni 80 ta bo’lsa, eritmadagi ionlar sonini hisoblang (α = 75%).
A) 720
B) 240
S) 480
D) 142
2. Eritmada 720 ta ion mavjud bo’lsa, dissosilanmagan natriy sulьfat molekulalari sonini hisoblang. (α = 80%).
A) 60
B) 120
S) 240
D) 320
3. Sianid kislotaning 0,1 molyarli eritmasida vodorod ionlarining konsentrasiyasi 6·10^-3 molь/l bo’lsa, kislotaning dissosilanish darajasini aniqlang?
A) 0.06
B) 0,03
S) 0,5
D) 0,55
4. Agar modda molekulasining dissosilanish darajasi 15 % bo’lsa, 120 ta molekuladan qanchasi dissosilangan bo’ladi?
A) 18
B) 14
S) 24
D) 30
5. Kuchsiz elektrolitlarni toping?
A) CH₃COOH, H₂O, NH₄OH
B) HCl, ZnSO₄ , NH₄OH
S) CH₃COOH, H₂O, ZnSO₄
D) H₂O, ZnSO₄ , NH₄OH
6. Dissosilanish darajasi 0,032 ga teng bo’lgan 0,2 M li chumoli kislotaning dissosilanish konstantasini toping.
A) 2·10^-4
B) 2·10^-3
S) 2,5·10^-4
D) 3,2·10^-4
7. Eritma konsentrasiyasining ortishi natijasida kuchsiz elektrolitlarning dissosilanish darajasi qanday o’zgaradi?
A) kamayadi
B) ortadi
S) o’zgarmaydi
D) ortadi, so’ngra kamayadi
8. Natriy sulьfat dissosilanishidan hosil bo’lgan anionlar soni dissosilanmagan molekulalar tarkibidagi atomlar soniga teng bo’lsa, dissosilanish darajasi (α %) toping.
A) 87.5
B) 85.7
S) 78
D) 87
9. Kaliy sulьfat dissosilanishidan hosil bo’lgan kationlar soni dissosilanmagan molekulalar tarkibidagi atomlar soniga teng bo’lsa, dissosilanish darajasi (α %) toping.
A) 77.8
B) 87.5
S) 70
D) 85
10. Natriy sulьfat dissosilanishidan hosil bo’lgan kationlar sonining dissosilanmagan molekulalar soniga nisbati 9:1 bo’lsa, dissosilanish darajasini (α %) toping.
A) 82
B) 85
S) 78
D) 80