1. Tenglamasi CuCO3 Cu(OH)2

38. Oksidlanish – qaytarilish reaksiyasida molekulalarning koeffitsientlar yig‘indisini hisoblang. FeCl₂+KMnO₄+HCl=FeCl₃+MnCl₂+KCl+H₂O
A) 8 B) 11 C) 17 D) 19 E) 25
39. Oksidlanish – qaytarilish reaksiyasi tenglamasida natriy xloridning koeffitsientini toping. CrCl₃+NaClO+NaOH=Na₂CrO₄+NaCl+H₂O
A) 1 B) 3 C) 6 D) 9 E) 11
40. Ushbu reaksiyada TaCl₄+NaOH=Na₃TaO₄+NaCl+H₂O+H₂ necha mol osh tuzi hosil bo‘ladi? A) 10 B) 3 C) 5 D) 2 E) 8
41. Quyidagi oksidlanish – qaytarilish reaksiyasidagi koeffitsientlar yig‘indisini aniqlang. KI+H₂SO₄→H₂S+I₂+H₂O+K₂SO₄
A) 22 B) 23 C) 25 D) 26 E) 28
42. Quyidagi reaksiyada qaytarilgan modda koeffitsientini aniqlang. FeS₂+HNO₃(kons.)→Fe(NO₃)₃+H₂SO₄+NO₂+H₂O A) 18 B) 1 C) 7 D) 15 E) 2
43. Quyidagi oksidlanish – qaytarilish reaksiyasining chap va o‘ng tomonidagi moddalar koeffitsientlari nisbatini aniqlang.
C₂H₂+KMnO₄+H₂O→HOOC–COOH+MnO₂+KOH
A) 13:17 B) 14:19 C) 14:20 D) 15:19 E) 19:15
44. Quyidagi oksidlanish – qaytarilish reaksiyasida qaytaruvchi oldidagi koeffitsientni aniqlang. CH₃CHO+Cu(OH)₂→CH₃COOH+Cu₂O+H₂O
A) 1 B) 2 C) 3 D) 4 E) 5