Bunyod jabborov umumiy kimyo

11. Kalsiy fosfid gidrolizi natijasida hosil bo‘lgan mahsulotdagi fosforning oksidlanish darajasini aniqlang.A) -3 B) 0 C) +1 D) +3
12. Vodorod bilan hosil qilgan birikmalarida musbat oksidlanish darajasiga ega bo‘ladigan elementlarni ko‘rsating. 1) uglerod; 2) azot; 3) fosfor;4) natriy; 5) kremniy; 6) xlor;

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

13. Alyuminiy nitrat tarkibidagi azotning valentligi oksidlanish darajasini ko‘rsating.

A) 5, +5 B) 4, +5 C) 3, +3 D) 3, +5

14. Quyidagi birikmalardagi uglerod atomining oksidlanish darajalar ketma – ketligini toping.

COCl₂; CH₂Cl₂; CHCl₃; CCl₄;

A) +4. +2. -2. 0 B) 0. -2. +3. -4

C) +4. 0. +2. +4 D) +2. +4. -2. -4

15. 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
16. 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
17. 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