1. 31g fosfordan necha gramm fosfor (V)-oksidi olish mumkin ?

VIII-sinf . Kimyo.

1. 31g fosfordan necha gramm fosfor (V)-oksidi olish mumkin ?

A) 35.5g. B) 71g. C) 142g D) 144g
2. 5.6g temir mis sulfat tarkibidagi necha gramm misning o’rnini olishi mumkin
A) 64g. B) 6.4g C) 3.2g. D) 32g
3. 32g mis (II)- sulfat bilan necha gramm o’yuvchi natriy almashinish reaksiyasiga kirishishi mumkin?
A) 16g. B) 32g. C) 40g. D) 56g
4. Quyidagi moddalarning qaysi biridan kislorod olish mumkin ?
A) Na₂SO₄ B) KMnO₄ C) K₃PO₄ D) HNO₃
5.Davriy sistemada elementning tartib raqami qanday ma’noga ega ?
A) Yadro zaryadiga teng B) Elektron qobiqlari soniga teng
C) Neytronlar soniga teng D) to’g’ri javob yo’q
6. Quydagi qaysi element atomining tuzilishi 2e ,8e,8e ekanligini aniqlang ?
A) K B) Ar C) CI D) Ag
7 s-elementlar qatorini ko’rsating ?
A) Li Na Ca B) Na Md O C) Li Na CI D) Li S Cu
8 P-elementlar qatorini ko’rsating ?
A) Si N CI B) Si Md CI C) N CI Ca D) Li S Cu
9. Davriy sistema va davriy qonun qachon kashf etilgan ?
A) 1861y B) 1869y C) 1879y. D) 1809 yil
10. Elektrmanfiyligi yuqori bo’lgan elementni ko’rsating ?
A) kislorod B) xlor C) azot D) Ftor
11. Ammiak malekulasida kimyoviy bog’lanishning qaysi turi kuzatiladi ?
A) ion bog’lanish B) kovalent bog’lanish
C) qutbli kovalent bog’lanish D) Metall bog’lanish
12. Osh tuzi qanday bog’lanish natijasida g’osil bo’lgan
A) ion bog’lanish B) kovalent bog’lanish
C) qutbli kovalent bog’lanish D) Metall bog’lanish
13.Oksidlanish darajasi +6 bo’lgan elementni ko’rsating ?
A) N₂ B) Ca C) S D) Na
14. 2.3g natriydagi atomlar sonini aniqlang?
A) 6.02.10²³ B) 6.02.10²² C) 6.02.10²⁴ D) 6.02.10²⁵
15.Kislorod necha gradusda suyuqlanadi ?
A) -160⁰C B) -170⁰C C) -183⁰C D) -185⁰ C
16. 36g ko’mir yonishi uchun necha litr ( n.sh.da ) kislorod kerak bo’ladi ?
A) 22.4l B) 44.8l C) 67.2l. D) 22.8
17. Natriy atomining elektron konfiguratsiyasi qanday?
A) 1S²2S²2P⁶3S¹ B) 1S²2S²2P⁶3S²
C) 1S²2S²2P⁶3S²3P¹ D) to’g’ri javob yo’q.
18. 3.2g kislorod n.sh.da qancha hajmni egallaydi ?
A) 2.24L B) 22.4 L C) 224L D) 2240 L
19. Kislorod qaysi birikmasida -1 oksidlanish darajasini namoyon qiladi?
______________________________________________________
20. Elektrmanfiyligi yuqori bo'lgan elementni ko'rsating.
__________________________________________________________
21. Har qanday gazning 1 moli normal sharoitda qanday hajmni egallaydi?
_______________________________________________________
22. 1.8 gr suv parchalanganda necha litr vodorod hosil bo’ladi?
_______________________________________________________
23. Avagadro doimiysini yozing.
__________________________________________________________
24. 10 mol suv necha gr. keladi?
__________________________________________________________
25. Karbonat angidrid (CO₂) ning molekulyar massasi qancha?
__________________________________________________________
VIII sinf. Kimyo

1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
B	B	A	B	A	B	A	A	B	D	C	A	C	B	C	C	A	A

19.H O
20.F
21 22.4
22 2.24 l.
23 6.02*10²³
24 180 gr.
25 44