Mustaqillik yillarida mamlakatimizda hukumatimiz tomonidan ta’lim sohasiga eng muhim vazifa sifatida e’tibor qaratib kelinayotgani sir emas. Bu sohada qator islohotlar qabul qilindi

13. Quyidagi o'zgarishlar natijasida qanday X modda hosil bo'ladi?

+HOH

+CO₂

+CO₂

C a²⁺ Ca(OH)₂ X

A) CaC03; В) Ca(HC03)2; C) CaO; D) Ca(OH)2.

14.Havoda eng kam korroziyaga uchraydigan metallning nomini aniqlang.

A) Mis; B) Temir; C) Xrom; 0) Rux.

15.Shisha Na₂CaO 6SiO₂ tarkibidagi kalsiy oksidining massa ulushini (% hisobida) aniqlang.

A) 11, 7%; B) 15,6%; C) 13,4%; D) 24,4%.

Test raqamlari	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
O’quvchining javoblari.
O’qituvchining belgilari

Nazorat ishining bali _________

5-Nazorat ishi
Mavzu: Metallarning kimyoviy xossalarini namoyon qiluvchi tajribalarni bajarish.

Nazorat shakli: Amaliy mashg'ulot.

I variant

Tajriba: Metallarning tuzlar eritmalari bilan o‘zaro ta’siri.

Birinchi probirkaga mis (II) sulfat yoki mis (II) nitrat eritmasidan 1-2 mi quying,. ustiga kichkina mixni ipga bog'lab tushiring va kuzating. Ma’lum bir vaqt o'tgandan keyin mixda qanday o'zgarish sodir bo'ladi?

Ikkinchi probirkaga kumush nitrat yoki qo‘rg‘oshin (II) nitrat eritmasidan quying, ustiga mis simni bo'lakchasidan soling va kuzating. Mis simi bo‘lakchasida qanday o'zqarish sodir bo'ladi?

Ikkala probirkada sodir bo'ladigan hodisaning reaksiya tenglamasini molekular va ionli ko'rinishda yozing.

Xulosa____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________