Sana: 1- nazorat ishi Nazorat shakli: Yozma ish

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O’quvchining bahosi :
SANA: Nazorat ishi- 8
1. Quyidagi reaksiyalardan oksidlanish- qaytarilish reaksiyalarning tenglamasini ajrating.
1. CaO+H2O = Ca(OH)2 2. 2H2+O2 = 2H2O 3. CuCl2+Fe =FeCl2+Cu
4. 2H2S+O2 = 2H2O+2S 5. KOH+H3PO4 = K3PO4+H2O
A) 1,2,4 B) 2,3,4 C) 1,2,3 D) 3,4,5
2. Qaytarilish jarayonini ko‘rsating.
A) [S2]2-  2S B) [S2]2-  2S+4 C) NO2--  NO3-– D) MnO42-- ----> MnO2
3. Quyidagi jarayonda: Cr2O7-2 + H+----> Cr3++ H2O xromning oksidlanish
darajasi necha birlikka o‘zgaradi ? A) 5 B) 4 C) 2 D) 3
4. Quyidagilardan qaysilari oksidlanish jarayonini aks ettiradi ?
1) Fe  Fe2+ 2) Cl+5  Cl-1 3) S+6  S+4 4) S-2  S0 A) 2,3 B) 3,4 C) 1,4 D) 1,3
5. Quyidagi MnO4-- ----> MnO2 jarayonda marganetsning oksidlanish darajasi
necha birlikka o‘zgaradi A) 5 B) 3 C) 4 D) 1
6. Quyidagi birikmalardan qaysi biri ichki molekulyar oksidlanish-qaytarilish
reaksiyasida qatnasha oladi ?
A) kaliy nitrat B) natriy nitrit C) ammoniy bixromat D) ammoniy fosfat
7. Moddalardan qaysi birlari eritmada bir vaqtning o‘zida ham oksidlovchi,
ham qaytaruvchi xossalarini namoyon qiladi ?
1) nitrat kislota 2) vodorod sulfid 3) nitrit kislota 4) xrom (III) xlorid
5) ammiak 6) sulfit kislota 7) vodorod peroksid 8) kaliy bixromat 9) marganets (IV) oksid A) 1,2,3,4,8 B) 2,3,4,5,9 C) 4,5,6,7,8 D) 1,6,7,8,9
8. Quyidagi moddalarning qaysilari faqat qaytaruvchi bo‘la oladi ?
1) vodorod sulfid . 2) kaliy yodid 3) vodorod 4) nitrat kislota
5) ammiak 6) kaliy xlorat 7) alyuminiy 8) vodorod peroksid
A) 1,2,3,5 B) 2,3,5,7 C) 1,2,5,7 D) 3,5,7,8
9. Quyidagi reaksiyada chap tomondagi koeffitsientlar yig‘indisi nechaga teng ?
H2O2 + CrCl3 + KOH  K2CrO4 + KCl + H2 A) 13 B) 15 C) 18 D) 21
10. Elektroliz jarayonida kimyoviy reaksiyalarning qaysi turi sodir buladi?
A) birikish B) urin olish C) gidroliz D) almashinish
2. Kaliy xlorid eritmasini elektroliz kilganda katodda qaysi modda ajralib chiqadi?
A) kaliy B) vodorod C) kislorod D) suv E)xlor
3.Qaysi tuzning eritmasi elektrolizga uchratilganda, katodda metall ajrab
chiqmaydi? A) AgNO3 B) CuSO4 C) FeSO4 D) NaNO3
4. K2SO4 eritmasi elektroliz qilinsa, katodda qanday modda ajraladi ?
A) kaliy B) vodorod sulfid C) vodorod D)kislorod
5. Tarkibida 2 mol osh tuzi bo‘lgan eritma to‘liq elektroliz qilinganda, necha
litr (n.sh.da) vodorod ajralib chiqadi ? [ Ar(Na)=23, Ar(Cl)=35,5 ]
A) 11,2 B) 5,6 C) 16,8 D) 22,4
6. Qaysi metall faqat elektroliz usuli bilan olinadi? A) mis B) temir C) alyuminiy D) xrom
15. Quyidagi reaksiyalarning qaysilari oksidlanish-qaytarilish reaksiyalari
turkumiga kiradi ?
1) HCl + NaOH = NaCl + H2O 2) H2SO4 + Ca(OH)2 = CaSO4 + H2O
3) Zn + HCl = ZnCl2 + H2 4) FeS2 + O2 = Fe2O3 + SO2 A) 1,2 B) 1,3 C) 2,3 D) 3,4