A 2/3 b 3/4 c 1/4 +D 1/3

A) 2,8 B) 3,36 C) 4,48 D) 6,72
#46. 12g ko’mirni yoqish uchun 18.667l kislarod va ozon(O₃) sarflangan bo’lsa aralashma tarkibidagi ozonning hajmiy ulushini hisoblang(%)
+A)40% B)60% C)50% D)30%
#47. 300gr marmar kuydirilganda 33.6l gaz hosil bo’ldi marmar tarkibida massa jihatdan necha % begona jinslar bor
+A)50% B)40% C)60% D)70%
#48. N₂ va O₂ aralashmasida hajm jihatidan 40% N₂ bo’lsa kislarodning massa ulushini toping.
A)63.1% B)60% C)36.9% D)28.5%
#49. 8gr CH₄ ga quyosh nuri ishtirokida 22,4l Cl₂ qo’shilganda hosil bo’lgan organik modda massasini toping?
+A)42.5 B)25.25 C)59.75 D)36.5
#50. 1875- yilda fransuz olimi Lekok de Buabodran qaysi elementni kashf qildi?
+А)Ga В) Sc С) H D) Ge
#51. Na₂SO₄*nH₂O tarkibli kristal gidrat tarkibidagi tuz va suvning massa nisbati 1:0.89 bo’lsa n ning qiymatini toping?
А) 5 В) 3 С) 4 +D) 7
#52. 138 gr xH₂SO₄*ySO₃ tarkibli oleum tarkibidagi SO₃ ning massasicha suvda eritilganda 82.58 % li sulfat kislota eritmasi olingan bo’lsa oleum tarkibini aniqlang.
A) H₂SO₄*SO₃
B) H₂SO₄*1.5SO₃
C) H₂SO₄*3SO₃
+D) 2H₂SO₄*SO₃
#53. 2 mol amiak va 3 mol karbonat angidriddan iborat gazlar aralashmasining o’rtacha molekulyar massasini toping.
+A) 33,2 B) 12,8
C) 20,75 D) 34,4
#54. Lakmusga Na₂CO₃ tasir ettirilganda qanday ranga kiradi
A) sariq B) qizil
+C) ko`k D) rangsiz
#55.H₃PO₃ tarkibida nechta bog’ bor (α;π).
A)6 +B)7 C)5 D)8