Surxondaryo viloyati boysun tumani 7-umumta’lim maktabining – “A

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 O₂ 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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