Kiruvchilar uchun kimyo fanidan

22. (NH₄)⁺, (H₃О)⁺ ionlar uchun quyidagi qaysi xususiyatlar umumiy?
1) markaziy atomning valеntligi: 2) markaziy atomning gibridlanishi:
3) donor-aksеptor bog’ning mavjudligi: 4) markaziy atomning oksidlanish darajasi:
А) 1,2,3 В) 1,3 С) 2,3 D) 1,4


42. Elektrolitik – dissotsilanishga oid .

1. Natriy fosfat eritmasida 960 dona ion mavjud bo'lsa, eritmadagi dissotsialanmagan natriy fosfat molekulalari sonini hisoblang (a =30%).

A) 280 B) 560 C) 420 D) 2240
2. Alyuminiy sulfat eritmasida dissotiialanmagan molekulalar soni 25 ta bo'lsa, eritmadagi alyuminiy ionlari sonini hisoblang (a = 80%).
A) 100 B) 200 C) 50 D) 25
3. Alyuminiy xlorid eritmasida 600 dona ion mavjud bo'lsa, eritmadagi dissotsialanmagan alyuminiy xlorid molekulalari. Sonini hisoblang (a=75%).
A) 50 B) 25 C) 100 D) 75
4. Alyuminiy sulfat eritmasida dissotsialanmagan molekulalar soni 50 ta bo'lsa, eritmadagi ionlar sonini hisoblang (a =75%).
A) 150 B) 750 C) 560 D) 500
5. Alyuminiy sulfat eritmasida dissotsialanmagan molekulalar soni 40 ta bo'lsa, eritmadagi sulfat ionlari sonini hisoblang (a = 80%).
A) 160 B) 320 C) 480 D) 640
6. Na₂SO₄ eritmasida 690 dona ion mavjud bo`lsa, dissotsilangan Na₂SO₄ molekulalar sonini hisoblang. (a=80%)
A) 230 B) 57,5 C) 287,5 D) 172,5
7. Fe(III) sulfat eritmasida 280 dona ion mavjus bo`lsa, eritmadagi dissotsilangan molekulalarni, disssotsilanmagan molekulalarga nisbatini aniqlang. (a=60%)
A) 2 : 3 B) 3 : 2 C) 4 : 6 D) 7,5 : 1
8. Al₂(SO₄)₃ eritmasida dissotsilanmagan ,olekulalar soni 70 ta bo`lsa, nechta sulfat ioni eritmada mavjud. (a=50%)
A) 70 B) 350 C) 210 D) 140
9. Natriy fosfat eritmasida 780 dona ion mavjud bo`lsa, eritmadagi dissotsilanmagan natriy molekulalar sonini hisoblang (a=40%).
A) 2945 B) 390 C) 780 D) 585
10. Natriy fosfat eritmasida dissotsilanmagan molekulalar soni 35 ta bo`lsa, eritmadagi natriy ionlari sonini hisoblang. (a=65%)
A) 65 B) 35 C) 195 D) 260