Fanining stexiometrik qonunlari

23. Sariq qon tuzi K₄[Fe(CN)₆] tarkibidagi temirning oksidlanish darajasini toping.

A) 0 B) +2 C) +4 D) +6

24. Qizil qon tuzi K₃[Fe(CN)₆] tarkibidagi uglerodning oksidlanish darajasini toping.

A) 0 B) +2 C) +3 D) +4

25. Gidroksoniy ionidagi kislorodning oksidlanish darajasi, valentligi va gibridlanish turini aniqlang.

A) -2,3, sp³ B) -2,2, sp² C) -3,3, sp² D) -3,2, sp²

26. Quyidagi kremniy birikmalari uchun keltirilgan tarkiblardan kremniyning oksidlanish darajalarini toping.

Dala shpati – K₂Al₂Si₆O₁₆;

Kaolin – H₄Al₂Si₂O₉; Asbest – CaMg₃Si₄O₁₂;

A) +4,+4,+4; B) +4,-4,+4;

C) +4,-4,-4; D) +4,+2,+4.

27. Element atomining elektron konfiguratsiyasi quyidagicha tugallanadi: …3d⁵4s². Bu qaysi element? Uning maksimal va minimal oksidlanish darajasini toping.

A) Mn, +2,-1; B) Cr, +6,-2;

C) Fe, +3,0; D) Mn, +7,0.

28. Quyidagi birikmalarda oksidlanish darajasi +5 bo’lgan elementlarni aniqlang.

KNO₃; H₃PO₄; SnO₂; Fe₂O₃;

HClO₃; K₂MnO₄; K₂Cr₂O₇;

A) Sn, Cr; B) Mn, N, Cr;

C) N, P, Cl; D) Sn, Cl, K.

29. Quyidagi birikmalarning qaysi birida marganesning oksidlanish darajasi +4 ga teng?

A) KMnO₄ B) MnO(OH) ₂

C) MnSO₄ D) Mn₂O₃

30. Quyidagi birikmalarning qaysi birida azotning oksidlanish darajasi noldan kichik bo’ladi?

1) litiy nitrid; 2) bariy nitrid; 3) azot (II) oksid; 4) ammiak; 5) nitrat kislota; 6) azot (V) oksid;

A) 2,4,6; B) 1,2,6; C) 1,2,4; D) 1,3,5.

31. Quyidagi birikmalarni ular tarkibidagi azot atomining oksidlanish darajasi ortib borish tartibida joylashtiring.

1) ammoniy xlorid; 2) gidrazin – N₂H₄;

3) natriy nitrat; 4) azot (III) oksid;

5) azot (IV) oksid;

A) 2,1,4,5,3; B) 1,2,4,5,3;

C) 3,4,5,2,1; D) 1,2,5,4,3.