Kimyo fanidan

Sana ______
4-nazorat ishi.
Mavzular: Kislorod-kimyoviy element. Kislorod—oddiy modda. Uning olinishi. Kislorodning kimyoviy xossalari,cbiologik ahamiyati va ishlatilishi. Kislorodning tabiatda aylanishi, havoning tarkibi. Havoni ifloslanishdan saqlash. Moddaning yonishi. Yonilg’ilarning turlari.
Nazorat shakli:Yozma ish
I-variant
1.Kislorodni kashf etilishida hissa qo’shgan olimlardan kimlarni bilasiz?
2.2,24 l kislorod molekulasi massasi necha gr?
3.0,15mol H₂SO₄necha gr?
Kompetentlikni aniqlash uchun materiallar:
4.Tarkibida kislorod bo’lgan qanday moddalar haqida eshitgansiz?
5.Kislorod qanday sohalarda ishlatiladi?
II-variant.
1.Kislorodni laboratoriyada olinish reaksiya tenglamalarini yozing.
2. 12,25gr Bertole tuzidan necha l (n.sh.da) kislorod hosil bo’ladi?
3.8,8gr CO₂ (n.sh.da) qancha hajmni eallaydi?
Kompetentlikni aniqlash uchun materiallar:
4.Qanday yonilg’i turlari haqida eshitgansiz?
5.Ozon tabiatda qachon hosil hosil bo’ladi?
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Baho________