Kimyoviy bog‘lanish

02-10son-21.
246. tenglamadagi koeffitsientlar yig‘indisi nechaga teng bo‘ladi?
A) 69 B) 68 C) 59 D) 55 E) 39
02-10son-22.
247. Qisqa tenglamadagi keltirilgan
MnO
kislotali muhitda boradigan reaksiyada N₂O oldidagi koeffitsient nechaga teng?
A) 2 B) 3 C) 8 D) 10 E) 16
02-10son-23.
248. AI+NO
reaksiya tenglamasida ionining koeffitsientini toping.
A) 1 B) 2 C) 3 D) 4 E) 5
02-10son-24.
249.
Reaksiya tenglamasi tenglashtirilganda, berilganlardan qaysi birining koeffitsienti katta bo‘ladi?
A) brom ioni B) bromat ioni C) vodorod ioni
D) brom E) suv molekulasi
02-10son-25.
250. PbO₂+MnO₂+HNO₃=
Pb(NO₃)₂+HMnO₄+H₂O
tenglamasini tenglashtiring va N₂O koeffitsientini aniqlang.
A) 2 B) 3 C) 4 D) 7 E) 14
02-10son-27.
251. Cr₂O₃+KNO₃+Na₂CO₃=Na₂CrO₄+KNO₂+CO₂
tenglamadagi SO₂ ning koeffitsientini aniqlang.
A) 1 B) 2 C) 3 D) 4 E) 5
02-10son-28.
252. KMnO₄+H₂SO₄+H₂C₂O₄→ tenglamani tugallang va koeffitsienti eng kichik birikmani toping.
A) KMnO₄ B) H₂SO₄ C) K₂SO₄ D) CO₂ E) H₂O
02-10son-29.
253. Cu₂S+HNO₃=Cu(NO₃)₂+NO+H₂SO₄+H₂O
tenglamasidagi HNO₃ ning koeffitsientini toping.
A) 22 B) 20 C) 19 D) 24 E) yo‘q
02-10son-30.
254. Quyidagi reaksiyalar turini aniqlang:
I. KCIO₃→KCI+KCIO₄ AI(OH)₃→AI₂O₃+H₂O
II. K₂O+N₂O₅→KNO₃ FeCI₃+Fe→FeCI₂
A) I-ajralish; II-o‘rin olish
B) I-birikish; II-almashinish
C) I-o‘rin olish; II-ajralish
D) I-ajralish; II-birikish
E) I-almashinish; II-birikish