13-mavzuning 2-darajali masalalari
1.
Ham oksidlovchi, ham qaytaruvchi xossalarga ega bo'lgan moddalarni toping (kationlar
xossalarini hisobga olmang).
1) nitrat kislota;
2) nitrit kislota;
3) vodorod sulfid;
4) xrom (III) xlorid;
5) vodorod peroksid; 6) sulfat kislota;
7) kaliy dixromat;
8) sulfit kislota.
A) 1, 2, 5, 7
B) 2, 4, 5, 7
C) 2, 3, 6, 7
D) 2, 4, 5, 8
E) 2, 5, 7, 8
2.
Qaysi reaksiyada vodorod oksidlovchidir?
A) CuO + H
2
→
B) Cl
2
+ H
2
→
C) Na + H
2
→
D) FeO + H
2
→
E) P + H
2
→
3.
Zarrachalarning oksidlanish darajasi o`zgarmaydigan reaksiyani ko'rsating.
A) NaOH + SO
2
B) NaNO
3
→
C) Cl
2
+ H
2
O →
D) CuSO
4
+ Fe→
E) Ca + H₂O →
4.
Quyidagi birikmalardagi uglerod atomining oksidlanish darajalar ketma-ketligini toping:
COCl
2
, CH
2
Cl
2
, CHCl
3
, CCl
4
A) +4, +2, -2, 0
B) 0, -2, +3, -4 C) +4, 0, +2, +4
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D) +2, +4, -2, -4
E)+4, -2, -4, +4
5.
Qaysi gidridlar oksidlovchi xossaga ega?
1) CH
4
; 2) NH
3
; 3) H
2
O; 4) HF
A) 1,2 B) 1,3 C) 1,4 D) 2,3 E) 3,4
6.
Quyidagi reaksiya KOH+NO
2
→ KNO
3
+ KNO
2
+H
2
O turini aniqlang.
A) almashinish
B) o'rin olish
C) oksidlanish-qaytarilish-disproporsiyalanish
D) oksidlanish-qaytarilish-molekulalararo disproporsiya-lanish
E) oksidlanish-qaytarilish-ichki molekulyar dispro-porsiyalanish
7.
Kalsiy fosfid gidrolizi natijasida hosil bo'lgan mahsulotdagi fosforning oksidlanish darajasini
aniqlang.
A)-3 B)0
C) +1 D) +3 E) +5
8.
Quyidagi reaksiyada H
3
PO
3
→ PH
3
+ P
2
O
5
+ H₂O moddalar koeffisientlari yig'indisini
hisoblang.
A) 22 B) 20 C) 19 D) 44 E) 17.
9.
Oksidlanish-qaytarilish reaksiyalari qaysilar?
1) H
2
+S → H₂S;
2) H₂O
𝑒𝑙𝑒𝑘𝑡𝑟𝑜𝑙𝑖𝑧
→
H₂+O₂
3) Mg + FeCl
3
→ MgCl2+Fe; 4) AgNO
3
+ KCl → AgCl + KNO
3
;
5) KClO
3
→ KCl+KClO
3
;
6) NaCl + H
2
SO
4
→ Na
2
SO
4
+ HCI
A) 1, 2, 4, 5
B) 1, 2, 3, 4
C) 1, 2, 3, 5
D) 3, 4, 5
E) 1, 2, 5, 6
10.
Azot (V) oksidi molekulasidagi azotning oksidlanish darajasini, valentligini, donor- akseptor
bog'lanishlar sonini aniqlang.
A) +3, 4, 1
B) +3, 4, 0
C) +5, 4, 1
D) +5, 4, 0
E) +5, 3, 1
11.
Quyidagi kremniy birikmalari uchun keltirilgan tarkiblardan kremniyning oksidlanish
darajalarini toping.
dala shpati - K
2
Al
2
Si
6
O
16
; kaolin - P
4
Al
2
Si
2
O
9
; asbest – CaMg
3
Si
14
O
12
A) +4, +4, +4 B) +4, -4, +4 C) +4, -4, -4
D) +4, +2, +4 E) +2, +2, +4
12.
Quyidagi brikmalarning qaysi birlarida azotning oksidlanish darajalari noldan kichik bo`ladi?
1)litiy nitrid; 2) bariy nitrid;
3) azot (II) oksid;
4)ammiak;
5) nitrat kislota;
6) azot(V) oksid.
A) 2,4,6
B) 1,2,6
C) 1,2,4
D) 1,3,5
E) 2,3,4
13.
Quyidagi birikmalarni ular tarkibidagi azot atomining oksidlanish darajasi ortib boorish
tartibida joylashtiring.
1) ammoniy xlorid; 2) gidrazin- N
2
H
4
; 3) natriy nitrat; 4) Azot (III) oksid; 5) Azot (IV) oksid
A) 2,1,4,5,3
B) 1,2,4,5,3
C) 3,4,5,2,1
D) 1,2,5,4,3
E) 2,1,3,5,4
14.
Kalsiy karbidda uglerod atomining valentligi va oksidlanish darajasi qanchaga teng bo’ladi?
A) 4; -2
B) 1; -1
C) 4; -1
D) 2; -1
E) 2; -2
15.
Suv molekulasi va proton orasida hosil bo’lgan gidroksoniy kationida kislorodning
oksidlanish darajasi va valentligi nechaga teng?
A) -2; 2
B) -2; 3
C) -1; 2
D) -1; 3
E) -2; 4
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