1. Faqat metallardan tashkil topgan qatorni aniqlang. A rubidiy, stronsiy, kobalt, titan

1. Faqat metallardan tashkil topgan qatorni aniqlang.
A) rubidiy, stronsiy, kobalt, titan
B) azot, oltingugurt, bor, fosfor
C) uglerod, berilliy, kalsiy, kremniy
D) simob, astat, fransiy, fosfor
2.Elektronlar soni bir xil bo‘lgan zarrachalarni aniqlang.
1) Cr⁶⁺; 2) P^-3; 3) Mn⁺⁷; 4) Fe²⁺; 5) Fe³⁺ ; 6) S^2- ; 7) Ca²⁺; 8) Ar; 9) Se^2+; 10) Si^-4;
11) Br ^-; 12) Cl^-
A) 1,2,4,6,8,9,10,11
B) 3,4,5,8,10,11,12
C) 1,2,3,6,7,8,10,12
D) 5,6,7,8,9,11,12

3.Berilgan yo‘nalishda moddalarning tarkibidagi elektron, proton va neytronlar yig'indisi qanday o’zgarishini aniqlang?

a) ortadi b) kamayadi d) o'z garm aydi SiH₄ N₂O CO₂ N₂O₃ O₃
A) la, 2d, 3a, 4d B) 2a, la, 4b, 3a
С) 3a, 4b, la, 2d D) 4b, 3b, 2d, la
4.Faqat murakkab moddalardan tashkil topgan qatorlarni aniqlang.
1) metan, aftimiak, malaxit
2) suv, fosfin, azot
3) ozon, olmos, grafit
4) karbin, oq fosfor, marganes
5) malaxit, marmar, suv
A) 1,2 B) 1,5 C) 3,4 D) 4,5
5.Quyidagi birikm alarning qaysi birida marganesning oksidlanish darajasi + 4 ga teng?
A) KMnO₄ В) M nO₂
C) MnSO₄ D) Mn₂O₃
6.Alyuminiy nitrit tarkibidagi azotning valentligi oksid­lanish darajasini ko‘rsating.
A) 5, +5 B) 4, +5 C) 3, +3 D) 3, +5
7. Tarkibida azotning massa ulushi 63,63%, kislorodniki esa 36,37% bodgan azot, oksidining formulasini kohsating.
1)N₂O 2) N₂O₃ 3) N₂O₅ 4) NO 5) NO₂
A) 3 B) 4 C) 2 D) 1
8.35 g azot va 2 mol vodoroddan iborat aralashmadagi atomlar yig‘indisini toping.
A) 15,05∙10²³ B) 12,04∙10²³
C) 24,08∙10²³ D) 39,13∙10²³