Xorazm viloyati qo’shko’pir tumani 3- umumta`lim maktabining – “ ” sinf

Ishning borishi: bug`latgich kosachaga sham yoki quruq yonilg`i bo`lagini o`rnatib yondiriladi. Alangani tuzulishiga etibor bering. Sham tarkibi paraffin bo`lib u asosan yonganda uglerod va yonuvchi gaz hosil bo`ladi. Uglerod ko`mir holida hosil bo`lib

cho`g`langan zarrachalar alanga yorug`ligini hosil qiladi. Shamni yoqib 15 – 20 sm ingichka cho`pni shm o`rtasidan o`tkazing va cho`pni yongan qismiga qarab alangani kuchli yonuvchi qismini aniqlang. Alangaga sovuq shisha plastinkani tutub turing va qurum xosil bo`lishini kuzating. Xulosani yozing.

Xulosa.__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Sana Ball Imzo
1-Nazorat ishi

Mavzu : Dastlabki kimyoviy tushunchalar

Nazorat shakli: Kimyoviy diktant.

1.Kimyo fani________________________________________________________

___________________________________________________to’g’risidagi fandir.

2.Jahonda tanilgan buyuk ajdodlarimiz___________________________________

_________________________________________________________________lar

VIII-X asrdalardayoq o’zlarining ilmiy asarlarida kimyoviy moddalardan turmush

ehtiyojlaridan va turli xil kasalliklarni davolashda foydalanish yo’llari haqida

dastlabki ma’lumotlarni keltirganlar.

3.Kimyo fani va sanoatning rivojlanishiga o’z hissalarini qo’shgan va qo’shib

kelayotgan o’zbekistonlik kimyogar olimlar- _______________________________

______________________________________________________________________________________________________________________________________

va boshqalar kimyoning turli yo’nalishlari bo’yicha ilmiy-tadqiqotlar olib borganlar

va olib bormoqdalar.

4. Tajriba davomida termometr sinib ketsa , tokilgan simobni__________________

_______________________________________________ orqali yig’ib olish kerak.

5. Natriy metalini __________________________solingan idishda saqlash kerak.

6. Kislotani suyultirishda_________________________________________shart.

7._________________________________________________________________

_________________________________________________________________________________________________________________kimyoviy xossa deyiladi