1. Tenglamasi CuCO3 Cu(OH)2

73. Qisqa tenglamasi keltirilgan kislotali muhitda boradigan reaksiyada suv oldidagi koeffitsient nechaga teng?
A) 2 B) 3 C) 8 D) 10 E) 16
74. reaksiya tenglamasidagi ionining koeffitsientini toping. A) 1 B) 2 C) 3 D) 4 E) 5
75. reaksiya tenglamasi tenglashtirilganda berilganlardan qaysi birining koeffitsienti katta bo‘ladi?
A) brom ioni B) bromat ioni C) vodorod ioni D) brom E) suv molekulasi
76. PbO₂+MnO₂+HNO₃→Pb(NO₃)₂+HMnO₄+H₂O tenglamani tenglashtiring va H₂O koeffitsientini aniqlang. A) 2 B) 3 C) 4 D) 7 E) 14
77. Cr₂O₃+KNO₃+Na₂CO₃→Na₂CrO₄+KNO₂+CO₂ tenglamadagi CO₂ ning koeffitsientini aniqlang. A) 1 B) 2 C) 3 D) 4 E) 5
78. KMnO₄+H₂SO₄+H₂C₂O₄→ tenglamani tugallang va koeffitsienti eng kichik birikmani toping. A) KMnO₄ B) H₂SO₄ C) K₂SO₄ D) CO₂ E) H₂O
79. Elektr yoyi yordamida uglerodning azot bilan reaksiyasi natijasida hosil bo‘lgan moddada nechta π – bog‘ bo‘ladi, undagi uglerodning gibridlanish turi va oksidlanish darajasi qanday bo‘ladi?
A) 4; sp³; -3 B) 4; sp; +3 C) 2; sp; -3 D) 4; sp²; +2 E) 2; sp²; -4
80. Temir xromit (xromit temirtoshi) ning ko‘mir bilan qizdirilishi natijasida hosil bo‘lgan moddalardagi xrom, temir va uglerod atomlarining oksidlanish darajalarini va reaksiyaning o‘ng tomonidagi koeffitsientlar yig‘indisini toping.
A) 0; 0; +2; 7 B) +2; 0; +4; 8 C) –1; –3; 0; 8 D) +1; +1; +5; 4 E) 0; +3; 0; 7
81. Cu₂C₂+HNO₃→Cu(NO₃)₂+CO₂+H₂O+NO₂ reaksiyada oksidlovchining koeffitsienti nechaga teng?
A) 6 B) 16 C) 10 D) 12 E) 11