Ning molekulyar massasini hisoblang? 162 B 293 c 126 d 287

1-variant

1. 
   Ca(HCO₃)₂ ning molekulyar massasini hisoblang?
   

1. 
   162 B) 293 C)126 D)287
   

2. 
   Mg(HCO₃)₂ ning molekulyar massasini toping?
   

1. 
   162 B)146 C)241 D)132
   

3. 
   Na₂O ning ekvivalentligini toping?
   

1. 
   31 B) 62 C) 34 D) 42
   

4. 
   K₂CO₃ ning ekvivalentligini toping?
   

1. 
   69 B) 49,5 C) 79 D)138
   

5. 
   Davriy sistemaning IV-guruh elementining yuqori oksidi tarkibida O-53,3 % bo’lsa,elementni toping?
   

1. 
   C B) Si C) Sn D)Pb
   

6. 
   Davriy sistemaning I-guruh elementining yuqori oksidi tarkibida O-25,8 % bo’lsa,elementni toping?
   

1. 
   Li B) K C) Na D) Rb
   

7. 
   Davriy sistemaning II-guruh elementining yuqori oksidi tarkibida O-40 % bo’lsa,elementni toping?
   

1. 
   Be B) Mg C) Ca D) Zn
   

8. 
   Reaksiya unumi 50% bo’lgan sharoitda 2 mol kaliy permanganat termik parchalanganda, necha litr kislorod ajraladi?
   

1. 
   11,2 B) 22,4 C) 33,6 D) 44,8
   

9. 
   Massasi 12.25 g bo’lgan bertole tuzining parchalanishidan 6,72 litr O₂ ajralgan bo’lsa unumni toping?
   

1. 
   60 B) 70 C) 80 D) 50
   

10. 
    Massasi 200 g bo’lgan kalsiy karbonat parchalanishidan 33 l karbonat angidrid ajralib chiqdi.Reaksiya unumini toping.
    

1. 
   85 B) 90 C) 73.66 D) 93,75
   

11. 
    4,4 g CO₂ ning atomlar sonini toping?
    

1. 
   18*10²² B) 1,8*10²⁴ C) 1,2*10²² D) 12*10²³
   

12. 
    Fosfinning formulasi ?
    

1. 
   PH₃ B) COCl₂ C) NH₃ D) F₂
   

13. 
    Ni(OH)₂ qanday asos?
    

1. 
   suvda erimaydigan B) suvda eriydigan C) amfoter D) asoslarga kirmaydi
   

14. 
    1,3 valentli elementlarni ko’rsating?
    

1. 
   Au,Tl B) Ag,Te C) Al,Na D) Cu,Ag,Hg
   

15. 
    144 kPa,18 C haroratdagi 13,44 l gaz 35,2 g kelsa,gazni toping?
    

1. 
   CO₂ B) NO₂ C) N₂O D) A,C javoblar
   

2-variant

1. 
   Ba(HCO₃)₂ ning molekulyar massasini hisoblang?
   

1. 
   162 B) 259 C) 226 D) 297
   

2. 
   Sr(HCO₃)₂ ning molekulyar massasini toping?
   

1. 
   234 B) 146 C)210 D)132
   

3. 
   K₂O ning ekvivalentligini toping?
   

1. 
   31 B) 94 C) 34 D) 47
   

4. 
   Al₂(SO₄)₃ ning ekvivalentligini toping?
   

1. 
   30 B) 47 C) 57 D)15,55
   

5. 
   Davriy sistemaning V-guruh elementining yuqori oksidi tarkibida E-43,66 % bo’lsa,elementni toping?
   

1. 
   N B) P C) V D)As
   

6. 
   Davriy sistemaning III-guruh elementining yuqori oksidi tarkibida E-52,9 % bo’lsa,elementni toping?
   

1. 
   B B) Al C) Ga D) Sc
   

7. 
   Davriy sistemaning IV-guruh elementining yuqori oksidi tarkibida E-27,27 % bo’lsa,elementni toping?
   

1. 
   C B) Si C) Ti D) Zr
   

8. 
   79 g KMnO₄ qizdirilganda, 5,32 litr O₂ ajralgan bo’lsa, reaksiya unumini toping?
   

1. 
   91 B)92 C)95 D)94
   

9. 
   500 g CaCO₃ 80% unum bilan parchalanganda necha litr gaz ajraladi?
   

1. 
   22,4 B)44,8 C)67,2 D)89,6
   

10. 
    4 mol bertole tuzi parchalanganda necha litr gaz hosil bo’ladi.Reaksiya unumi 70%?
    

1. 
   94,08 B)134,4 C)67,2 D) 44,8
   

11. 
    1,25 mol fosgendagi molekulalar sonini hisoblang?
    

1. 
   30,1*10²³ B) 7,525*10²⁴ C) 75,25*10²² D) 22,5*10²³
   

12. 
    Propenning formulasini toping?
    

1. 
   C₂H₄ B) C₃H₆ C) C₃H₈ D) C₃H₄
   

13. 
    Ba(OH)₂ qanday asos ?
    

1. 
   suvda eriydigan B) suvda erimaydigan C) amfoter D) t.j.y
   

14. 
    2,3 valentli elementlarni toping?
    

1. 
   Fe,Co,Ni B) Au,Tl C) Cu,Ag,Hg D) C,Si,Ge,Sn,Pb
   

15. 
    139,2 mm.sim.ust.da,27 C haroratda 33,6 l ammiakning massasini aniqlang?
    

1. 
   2,34 B) 4,25 C) 31,87 D) 8,5