Navoiy shahar 16-sonli ayrim fanlar chuqur o’rganiladigan ixtisoslashgan maktabi 9-“ ”­­­­­ sinf o’quvchisi

Sana___________________________
7- Nazorat ishi
Mavzu: Marganes, temir cho’yan va po’lat.
Nazorat shakli:Masala yechish.
I-variant.
1. KMnO₄+KNO₂+H ₂SO₄= reaksiyani davom ettiring va elektron-balans usulida tenglashtiring.
2.Tarkibida 10%qo’shimcha modda bo’lgan 30gr kaliy permanganat parchalanganda necha gr marganesli birikma hosil bo’ladi.
3.Temir atomining oxirgi d elektronlarini kvant sonlarda ifodalang.

Kompetentlikni aniqlash uchun materiallar:

4.Hayotda ko’p kuzatadigan temirning zanglashini kimyoviy tenglamalar orqali tushuntiring?
5.Temir haqida qanday ma’lumotlarga ega bo’ldingiz?
II-variant.
1. KMnO₄+ H₂S + 8H2SO₄= reaksiyani davom ettiring va elektron-balans usulida tenglashtiring.
2.15,2gr temir(II)-sulfat kislotali sharoitda kaliy permanganat bilan oksidlanib necha gr temir (III)-sulfatga aylanadi?
3. Tarkibida 10% qo‘shimchalar tutgan qancha magnitli temir dan 10 t temir olinadi?
Kompetentlikni aniqlash uchun materiallar:
4.Ko’pincha tarkibida temir saqlovchi dorilar nima maqsadda ishlatiladi va temir saqlovchi qanday dorilar nomini bilasiz?
5.Mn elementi haqida 8-sinfda qanday ma’lumot berilgan?

Yechish:
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