Jizzax viloyati zomin tumani 2-maktabining – “ ” sinf o`quvchisi

 
Sana
 
 
Ball
 
Imzo 
7- Nazorat ishi 
Mavzu: 
Suvning tarkibi. Xossalari tarqalishi, ahamiyati, ishlatilishi.ifloslanishi. 
1- variant 
1. 2 mol suvda nechta vodorod atomi bor?
2
. 
20 g vodorod to’la yonishi uchun necha gramm va qancha hajm O
2
sarflanadi?
 
3. Suvning kimyoviy xossalarini yozing. 
Kompetentlikni aniqlash uchun materiallar: 
4.Nima uchun qish faslida muz suv yuzida qalqib yuradi? 
5.Suv havzalarini tozaligini saqlash uchun qanday takliflar bera olasiz? 
 
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