Viloyati tumanidagi umumiy o‘rta ta’lim maktabi

20. Javob: _________________________________________________________________ 
 
Nazorat ishi balli:___________________ 
 

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NAZORAT ISHI – 3 
Sana: _______________________ 
Nazorat shakli:
Masala yechish. 
I-VARIANT 
1. Tarkibida 50%S va 50%O bo’lgan moddaning formulasini toping. 
2. 32gr SO
2
ning modda miqdorini toping. 
3. Quyidagi reaksiyani tugallang va koeffisiyentlar qo’ying. 
H
2
+O
2
= Cu+Cl
2
= 
Kompetentlikni aniqlash uchun materiallar: 
4. Fizik o’zgarishlarni hayotiy misollar orqali tushuntiring. 
5. Tarkibning doimiylik qonunini hayotda kuzatgan misollar orqali izohlab bering. 
II-VARIANT 
1. Tarkibida 27,27%C va 72,73%O bo’lgan moddaning formulasini toping. 
2. 19,6gr sulfat kislota H
2
SO
4
ning modda miqdorini toping. 
3. Quyidagi reaksiyani tugallang va koeffisiyentlar qo’ying. 
Al+O
2=
Ca+Cl
2
= 
Kompetentlikni aniqlash uchun materiallar: 
4. Kimyoviy o’zgarishlarni hayotiy misollar orqali tushuntiring. 
5. Massaning saqlanish qonunini suvni olish reaksiyasi misolida tushuntirib bering. 
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