Ergashev Husniddin
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KIMYO
297
217.
Quyidagi oksidlanish-qaytarilish reaksiyasini tenglashtiring va o’ng tomondagi
koeffitsientlar yig’indisini toping KMnO
4
+ KOH + Na
2
SO
3
→ K
2
MnO
4
+ Na
2
SO
4
+ H
2
O
A) 4
B) 8
C) 5
D) 9
218.
Faqat oksidlovchi xossalarini namoyon qiluvchi zaraalarni ko’rsating.
1) K°
2) Na
+
3) Cr
3+
4) Al
3+
5) N
3-
6) Cr
3+
A) 2, 4, 6
B) 1, 3, 5
C) 2, 5, 6
D) 3, 5, 6
219.
Quyidagi reaksiyada koeffitsientlar yig’indisini va reaksiya turini toping.
A) 11, almashinish
B) 20, disproporsiyalanish
C) 14, ichki molekulyar
D) 9, disproporsiyalanish
2
20
. Quydagi oksidlanish-qaytarilish reaksiyasining o’ng tomonidagi koeffitsiyentlar
yig’indisini aniqlang. KMnO
4
+ KOH + Na
2
SO
3
→ K
2
MnO
4
+ Na
2
SO
4
+ H
2
O.
A) 4
B) 8
C) 5
D)9
221.
Faqat oksidlovchi xossalarini namoyon qiluvchi zarrachalarni ko’rsating.
1) K
0
;
2) Na
+
;
3) Cr
3+
;
4) Al
3+
;
5) Nr
3-
; 6) Cr
6+
A) 2, 4, 6 B) 1, 3, 6
C) 2, 5, 6
D) 3,5,6
222.
Quydagi reaksiya tenglamasidagi koeffitsiyentlar yig’indisini va reaksiya turini aniqlang.
S + KOH → K
2
S + K
2
SO
3
+ H
2
O
A) 11, almashinish B) 20, disproporsiyalanish
C) 14, ichki molekulyar D) 15, disproporsiyalanish.
223
. Quydagi reaksiyaning barcha koeffitsiyentlar yig’indisi nechaga teng.
As
2
S
3
+ HNO
3
→ H
3
AsO
4
+ SO
2
+ NO
2
+ H
2
O.
A)27 B) 58 C) 49
D)38
224.
Quydagi sodir bo’ladigan reaksiyalarning qaysi biri oksidlanish - qaytarilish reaksiyasi
hisoblanadi.
A) Na
2
O + SO
3
. C) MnO
3
+ HCl B) K
2
O + P
2
O
3
D) CrO + HCl
225.
0.4 mol MnO
4
-
ioni necha dona (N
A
) elektronni biriktirib MnO
2
ga aylanadi?
A)2 ∙ N
A
B) 1.6 ∙ N
A
C) 1.2 ∙ N
A
D)0.8 ∙ N
A
226.
0.5 mol qo’rg’oshin (II) gidroksid ozon ishtirokida oksidlanganda hosil bo’lgan gazning
massasiga teng massada kislorod olish uchun nechta gramm nikel (II) nitrat parchalanishi kerak?
A)264 B) 183 C) 366 D)240
227
. Agar x+y=15 bo’lsa , x va y ning qiymatini aniqlang.
P
x
S
y
+ HNO
3
+ H
2
O → H
3
PO
4
+ H
2
SO
4
+ NO.
A) x=4 y= 11 B) x=5 y=10 C) x=6 y=9 D) x=7.5 y=7.5
228.
KMnO
4
ning suvli eritmasi KNO
2
bilan reaksiyasidan 17.4 g cho’kma hosil bo’ldi.
Cho’kmai filtrlab, filtratga mis sulfat qo’shilganda hosil bo’ladigan cho’kmaning massasini
toping.
A)4.9 B) 9.8
C) 14.7
D) 19.6
229
. KMnO
4 ,
KI , H
2
SO
4
Suvli eritmalarning reaksiyasida hosil bo’lgan 5.08 g cho’kma H
2
S
eritmasiga qo’shildi ohirgi cho’kmani massasini toping.
A) 1.28 B) 0.32 C) 0.96 D) 0.64
230.
KMnO
4
va K
2
SO
3
reaksiyasidan suvli eritmadan hosil bo’lgan cho’kmani filtrlab, MnO
2
massasi 3.48 g bo’lganda filtratga alyuminiy sulfat qo’shilganida hosil bo’lgan cho’kmaning
massasini toping.
A) 1.04 B) 0.78 C) 0.39 D) 1.17
231.
60.5 g natriy nitritga 40 g 30 % li nitrat kislota quyilganida reaksiya natijasida hosil
bo’ladigan azot (III) oksididan qancha g hosil bo’ladi ?
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