Kimyoviy bog‘lanish

02-3son-25.
31. 80⁰C da kaliy yodidning 146 g to‘yingan eritmasi 20⁰C gacha sovutilganda, necha gramm kristall ajralib chiqadi? S(20⁰)=144, S(80⁰)=192
A) 24 B) 26 C) 34 D) 36 E) 38
02-3son-28.
32. Ammiakning 20⁰C dagi eruvchanligi 1 ml suvda 702 ml ga teng bo‘ladi. To‘yingan eritmadagi ammiakning massa ulushini (%) hisoblang. Ammiakning bosimini normal atmosfera bosimiga teng deb oling.
A) 25,6 B) 34,8 C) 35,0 D) 17,1 E) 24,2
02-6son-47.
33. 60⁰C dagi kaliy nitratning 105 g to‘yingan eritmasini 0⁰C gacha sovitganda, qancha gramm kaliy nitratning kristali ajraladi? Ko‘rsatilgan temperaturalardagi tuzning eruvchanligi 110 va 13 ga teng.
A) 48,5 B) 55,0 C) 52,3 D) 97,0 E) 50,0
02-6son-48.
34. Temperatura ortishi bilan tuzlarning eruvchanligi ham ortadi. Tuzlarning erish issiqligi qanday bo‘ladi?
A) ΔH>0 B) ΔH<0 C) ΔH=0 D) ΔH≤0 E) ΔH≥0
02-9son-37.
35. Qattiq moddalarning eruvchanligi qanday omillarga bog‘liq?
1) temperatura 2) bosimga 3) katalizator
4) erituvchining tabiatiga 5) erigan moddaning tabiatiga
A) 1,3,4 B) 2,3,4 C) 1,2,3 D) 1,4,5 E) 1,2,4,5
02-9son-57.
36. Ohakning suvda erishida issiqlik ajralib chiqadi. Temperaturaning ortishi ohakning erishiga qanday tasir etadi?
1) eruvchanlik kamayadi 2) eruvchanlik ortadi
3) tasir etmaydi 4) eruvchanlik o‘zgarmaydi
A) 1 B) 2 C) 3 D) 4 E) 3,4
02-9son-40.
37. Muz 0⁰C da suv ustida suzib yuradi. Bosimning ortishi muzning erishiga qanday tasir etadi?
1) eriydi 2) muzlash ortadi
3) o‘zgarmaydi 4) suzib yuradi
A) 1 B) 2 C) 3 D) 4 E) 3,4
02-9son-41.
38. 100 hajm dietil efirda 0,85 hajm suv eritilganda to‘yingan eritma hosil bo‘ladi. Efirdagi suvning eruvchanligi (C) ni hisoblang.
(ρ_efir=0,71 g/ml)
A) 1,2 B) 1,0 C) 1,11 D) 1,3 E) 0,95