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

11. Elementlarning qaysi qatori atom radiusi ortib borish tartibida keltirilgan?

A) N,As,Sb;

B) C,N,0,F;

C) Na,Be,AI,C;

D) Li,Be,B,He.

12. Suv, suyuq ammiak, suyuq vodorod ftorid qanday bog'ga ega?

A) Kovalent bog'ga ega;

B) Ion bog'ga ega;

C) Vodorod bog'ga ega;

D) Metall bog'ga ega.

13. Bir hil atomlardan hosil bo'lgan molekulalardagi atomlarning oksidlanish darajasi nechaga teng?

A) -1; В) 0; C) 1; D) 2.

14. Azot guruhchasi elementlarining qaysi xossasi bir-biriga o'xshaydi?

A) kimyoviy belgisi;

B) atom radiusi;

C) tashqi pog'onadagi elektronlar soni;

D) tartib raqami.

15. Quyidagi uchta zarracha: Ne°, Mg2 va F bir hil:

A) yadro zaryadiga;

B) massa soniga;

C) neytronlar soniga;

D) elektronlar soniga ega.

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 _________

2 - Nazorat ishi

Mavzu: Uglerod guruhi elementlari, uglerodning xossalari, karbonat kislota, kremniyning xossalari, silikat sanoati.

Nazorat shakli: Yozma ish.

I variant

1. Ohakli suv orqali uglerod (IV)-oksid mo'l o‘tkazilganda, dastlab ohakli suv loyqalanadi, so‘ngra loyqalanish yo‘qolib, tiniq eritma hosil bo‘ladi. Bu o‘zgarishlar natijasida sodir bo'lgan reaksiya tenglamalarni yozing.

2. Uglerodning kimyoviy xossalarini namoyon qiluvchi reaksiya tenglamalarini yozing.

3. 44.8 litr karbonat angidrid hosil qilish uchun (n.sh.) necha g kalsiy karbonati parcchalash lozim?

4. Quyidagi oksidlanish-qaytarilish reaksiya tenglamalariga koeffitsiyentlar tanlang va oksidlovchi hamda qaytaruvchini aniqlang.

A) C+H₂SO₄ = CO₂ + SO₂ + H₂O;

B) Si + NaOH = Na₄SiO₄ + H₂.

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