Qarshi davlat universiteti tabiiy fanlar fakulteti

19.Masalalar ta‘siri qonunining matematik ifodasini ko’rsating.
A. V₁ = K₁·| A | · | B | B. V₂ = K₂·| C | · | D |
|C| · |D|
C. K = -----------
A| · |B|
|C|^p · |D|^g
D. K = -------------
|A|^m · |B|ⁿ


20.Kislotaning dissotsilanishini aniqlang.
A.HNO₃ ⇄ H⁺ + NO₃^- B.NaOH ⇄ Na⁺ + OH C.Ca(OH)₂ ⇄ CO⁺² + OH^-
D.NaCl ⇄ Na⁺ + Cl^-
21. Gidroksidlarning dissotsilanishini ko'rsating.
A.HNO₃ ⇄ H⁺ + NO₃^- B.Ca (OH)₂ ⇄ Ca⁺² + OH^- C.NaCl ⇄ Na⁺ + Cl
D.H₂SO₄ ⇄ 2H⁺ + SO₄^-2
22. Tuzlarning dissotsilanishini ko'rsating.
A.NH₄NO₃ ⇄ NH₄⁺ + NO₃^- B.Ca (OH)₂ ⇄ Ca⁺² + 2OH^- C.HNO₃ ⇄ H⁺ + NO₃^-
D.Hamma javob to’g’ri


23.Qo’sh tuzlarning dissotsilanishini ko’rsating.
A.(NH₄)₂ Fe (SO₄)₂ ⇄ 2NH₄⁺ + Fe^-2 + 2SO₄^-2 B.NaCl ⇄ Na⁺ + Cl^-
C.[Ag (NH₃)₂] Cl ⇄ [Ag (NH₃)₂]⁺ + Cl^- D.Na₂SO₄ ⇄ 2Na⁺ + SO₄^-2


24.Ion almashinish reaktsiyalarining yo'nalishi reaktsiya mahsulotini nimasi bilan belgilanadi.
A.Qiyin eriydigan birikma.
B.Kam dissotsilanadigan molekulalar.
C.Kompleks ionlar va birikmalar.
D.Hamma javob to’g’ri.
25.Ion almashinish reaktsiyalari necha xil reaktsiya ko’rinishida yozish mumkin.

A.1.
B.2.

C.3.
D.4.


26.Qaysi moddalarni bufer aralashma sifatida ishlatish mumkin.
A.HCl + KCl.
B.HCOOH + HCOONa.
C.CH₃COOH + CH₃COONa
D.Hamma javob to’g’ri.
27.Qaysi bufer aralashmaning PH = 1 – 2 ga teng.
A.– HCl + KCl. B.HCOOH + HCOONa. C.CH₃COOH + CH₃COONa
D.– NaHCO₃ + Na₂CO₃


28.Qaysi bufer aralashmaning RN = 3 – 4 ga teng.

A.HCl + KCl. B.HCOOH + HCOONa C.CH₃COOH + CH₃COONa

D.– NaHCO₃ + Na₂CO₃
29.Qaysi bufer aralashmaning RN = 6 – 7 ga teng.

A.HCl – KCl B.HCOOH + HCOONa. C.CH₃COOH + CH₃COONa

D.NaHCO₃ + Na₂CO₃


30.Qaysi bufer aralashmaning RN = 9 – 10 ga teng.

A.HCl + KCl. B.HCOOH + HCOONa. C.NaHCO₃ + Na₂CO₃

D.NH₄OH + NH₄Cl


31.Kationlarni vodorod sulfidga munosabati bo'yicha gruppalarga ajratishni qaysi olim tavsiya etgan.
A.M.V. Lomonosov. B.N.A.Menshutkin. C.N.A.Tononaev. D.L.A.Chugaev.