Shofirkon tuman 1- umumiy o’rta ta’lim maktabining – “ ” sinf o`quvchisi

Sana: ________________________
8- Nazorat ishi
Mavzu: Cho’yan va po’lat.Kimyoviy ishlab chiqarish. Kimyoviy reaksiyalarning kimyoviy ishlab chiqarishdagi ahamiyati. Atmosfera va gidrosferani muhofoza qilish.
Nazorat shakli:Yozma ish.
I-variant.
1. Ikki valentli metall oksidining 4 g ni eritish uchun 36,5g 40% li xlorid kislota eritmasi sarf landi. Bu qaysi element oksidi edi?.
2.Domna pechida sodir bo’ladigan kimyoviy jarayonlarni yozing.

3. H3PO3 molekulasining markaziy zarrachasiga mos elektron konfiguratsiyasini toping.

Kompetentlikni aniqlash uchun materiallar:
4 .Atrof muhitni tozaligini saqlash uchun nimalarga e’tibor berasiz?.
5.Po’latni qanday turlarini bilasiz?
II-variant.
1. X, Y, Z elementlar bir davrda ketma-ket joylashgan. Ushbu element atomlari 3X, 2Y,
1Z miqdoriy nisbatda reaksiya davomida berishi mumkin boʻlgan maksimal elektronlar soni yigʻindisi 10 ga teng boʻlsa, Z element joylashgan guruh tartib raqami qanday boʻladi?
2. 80 gramm 20% li mis (II)-sulfat tuzi eritmasi bilan temir to‘liq reaksiyaga kirishganda necha gramm mis hosil bo‘ladi?
3.HClO₄ molekulasining markaziy zarrachasiga mos elektron konfiguratsiyasini toping.
Kompetentlikni aniqlash uchun materiallar:
4.Qishloq xo’jaligi ekinlari zararkunandalariga qarshi kurashish uchun pestitsidlardan foydalanish shartmi?
5.Siz plastmassa chiqindilari bilan atrof muhitga zarar keltirmaslik uchun nima qilgan bo’lardingiz?
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