Kimyoviy bog‘lanish

99-7son-20.
158. Quyidagi tenglama
S+KOH→K₂S+K₂SO₃+H₂O
koeffitsientlarini va reaksiya turini toping.
A) 14, disproporsiyalanish
B) 11, almashinish
C) 14, ichki molekulyar
D) 15, disproporsiyalanish
E) 15, neytrallanish
99-7son-22.
159. Quyidagi tenglamaniing chap tomonidagi moddalar koeffitsientlarini hisoblang.
Cr₂(SO₄)₃+Cl₂+KOH→K₂CrO₄+KCl+K₂SO₄+H₂O
A) 3 B) 4 C) 17 D) 19 E) 20
99-7son-23.
160. Xlorni marganets(IV) oksid, sulfat kislota va osh tuzi orasidagi reaksiya
MnO₂+NaCl+H₂SO₄→Na₂SO₄+MnSO₄+Cl₂+H₂O
asosida olish uchun mumkin, 134,4 l xlor olish uchun qancha (g) oksidlovchi talab etiladi?
A) 261 B) 522 C) 426 D) 852 E) 213
99-7son-47.
161. Quyidagi reaksiyada H₃PO₃→PH₃+P₂O₅+H₂O moddalar koeffitsientlar yig‘indisini hisoblang.
A) 22 B) 20 C) 19 D) 44 E) 17
99-7son-60.
162. Jarayonlarning qaysi biri oksidlanish-qaytarilish reaksiyasi bo‘la oladi?
A) PbO+CO B) NH₄Br
C) K₂SO₃+HCI→ D) Li₃N+H₂O→
E) Mg(HCO₃)₂+HCI→
00-3son-14.
163. H₂S, K₂Cr₂O₇ va H₂SO₄ reaksiyasi natijasida qanday moddalar hosil bo‘ladi?
A) S, CrO₃, K₂SO₄, H₂
B) H₂S, CrO₃, K₂SO₄, H₂O
C) S, Cr₂(SO₄)₃, K₂SO₄, H₂O
D) H₂S, Cr₂(SO₄)₃, K₂SO₄, H₂O
E) SO₂, Cr₂(SO₄)₃, K₂SO₄, H₂O