
30 talik test -3
Authored by Bobomurod Abdixashimov
Chemistry
11th Grade
Used 2+ times

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30 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2X + kYm =3XnYm reaksiya tenglamasidagi n va k ning qiymatlarini mos ravishda aniqlang.
1:6
2:3
1:2
2:1
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kislorod atomlari soni 5,8⦁Na ta bo‘lgan 10 % li kaliy gidroksid eritmasi massasini (g) hisoblang.
180
112
168
120
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Natriy digidrofosfat eritmasida dissotsilanish darajasi birinchi bosqich uchun 80%, ikkinchi bosqich uchun 20% va uchinchi bosqich uchun 5% bo‘lsa, eritmadagi gidrofosfat va fosfat ionlarining miqdoriy nisbatini aniqlang.
40:1
19:1
20:1
38:1
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
CO2 va O2 dan iborat 3 mol aralashma (Mo’r = 40 g/mol) natriy peroksid ustidan o’tkazilganda o’rtacha molar massasi 36,8 g/mol bo’lgan gazlar olindi. Reaksiya unumini (%, CO2 ga nisbatan) hisoblang.
80
50
70
60
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
. Benzol molekulasi tarkibida bog’ hosil qilishda qatnashgan gibrid orbitallar sonining gibridlanmagan orbitallar soniga nisbatini aniqlang.
3
1,5
1,25
2
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
0,1 mol CnH2n+2Ox tarkibli birikmani to'liq yondirish uchun 14,4 g kislorod sarflandi va 7,2 g suv hosil bo'ldi. Bunga ko‘ra n va x ning qiymatlarini mos ravishda aniqlang.
3:2
2:1
3:1
2:2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
39K35Cl va 40K37Cl dan iborat aralashmada 37Cl izotopining mol ulushi 30%. 18,95 gr shunday aralashmadagi m (39K34Cl) ni aniqlang.
7,4 g
14,8 g
11,1 g
3,7 g
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