Kimyoviy bog‘lanish

00-4son-44.
32. Vodorod gaz holdagi oddiy modda X bilan birikib U gazsimon moddani hosil qiladi. U-moddaniing havo kislorodi bilan platina katalizatori ishtirokida o‘zaro reaksiyaga kirishishi natijasida 44,8 l (n.sh.da) azot(II) oksid hosil bo‘lgan. X moddaning nomi va uning qancha massasi (g) reaksiyaga kirishganligini aniqlang.
A) azot, 32 B) azot, 56 C) ammiak, 34
D) azot, 14 E) azot, 28
00-10son-20.
33. Azotni laboratoriyada olish usulini ko‘rsating.
1) (NH₄)₂Cr₂O₇ Cr₂O₃+N₂+H₂O
2) NH₃+O₂→N₂+H₂O
3) CuO+NH₃→Cu+N₂+H₂O
4) NH₄NO₂ N₂+H₂O
5) NH₃+Br₂→N₂+HBr
6) NH₃+H₂O₂→N₂+H₂O
A) 1,4 B) 2,3 C) 1,5 D) 2,4 E) 2,6
01-1son-31.
34. Fosfor yonishiga yordam beradigan azot birikmasini ko‘rsating.
A) HNO₃ B) HNO₂ C) NH₄NO₂ D) N₂O
E) NH₃
01-1son-35.
35. Quyidagilardan qaysi formula fosfor(V) oksidning haqiqiy formulasi hisoblanadi?
A) R₂O₅ B) R₂O₃ C) R₄O₁₀ D) RSI₃ E) P₄O₆
01-1son-36.
36. Natriy nitrat qizdirilganda qanday modda hosil bo‘ladi?
A) NaNO₂ B) Na₂O C) Na₃N D) Na₂O₂ E) Na
01-2son-43.
37. Massa ulushi 9,8% bo‘lgan 500 g fosfor kislota eritmasida 28,4 g fosfor(V) oksid eritilgandan so‘ng hosil bo‘lgan eritmadagi H₃PO₄ ning massa ulushi (%) nechaga teng bo‘ladi?
A) 16,7 B) 14,7 C) 10,3 D) 17,6 E) 19,6
01-5son-33.
38. Pretsipitat o‘g‘itiga qaysi formula mos keladi?
A) Ca₃(PO₄)₂ B) Ca(H₂PO₄)₂
C) Ca(H₂PO₄)₂+2CaSO₄ D) (NH₄)₂HPO₄
E) CaHPO₄•2H₂O