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UNIVERSAL KIMYO

chemofficer
Keling!!! Kimyoni birgalikda órganamiz 🔥 Давайте!!! Изучаем вместе Химию 🔥 ustoz: Bunyod Raxmanov Bog'lanish 🔗 @ChemOfficer_bot Bog'lanish 🔗 @ProChem
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June 11, 13:52
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Quyidagilardan qaysilarining suvli eritmalari pH qiymati 7 dan kichik
A) suv va rux nitrat
B)

aluminiy xlorid va sirka kislota
C) kaliy atsetat va K2S
D) kaliy sulfit va nimadir
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June 11, 13:52
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MgSO4 ning 840 gr 40%li eritmasi 50°C gacha sovutildi. 648 gr to'yingan eritma olindi. MgSO4 *xH2O cho'kmaga tushdi. (S= 50 t=50 °C)
A) x ni aniqlang
B) kristalogidrat tarkibidagi kislorod atomlarining molini aniqlang.
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June 11, 13:52
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Savol
: (chin) Eritmaga xos ma'lumotni toping.
1) tarkibi bir xil moddadan iborat 2) fizik tasirlarda tarkibiy qismga ajratb bo'lmaydi 3) hosil bo'lishida issiqlik chiqishi yoki yutilishi mumkin 4) erigan modda qoʻshilganda hajm oʻzgaradi 5) butun hajm bòylab bir tekis tarqaladi

3,5
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June 11, 13:52
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PbO2+ Mn(+2) + H(+) =Pb(+2) + MnO4(-) + H2O o’ng tomon va chap tomondagi Koeffitsiyentlar yig’indisini toping?

mustaqil ishlang
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June 11, 13:52
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X befarq oksid gaz va propen teng mol nisbatda olingan aralashmaning He ga nisbatan zichligi 9 ga teng bo‘lsa, X gaz ni toping
A) SO2
B) NO

C) N2O
D) CO
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June 11, 13:52
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4 ta probirka bor. Propan kislota, propanal, propandiol-1,2, propanol-1. 3-probirkadagi moddani 1- va 4-probirkadagi moddalarni oksidlab olish mumkin. 2-probirka Cu(OH)2 bilan ko'k rangli eritma hosil qiladi. 1-probirka Cu(OH)2 bilan qizil chokma hosil qiladi. 3-probirkadagi moddani aniqlang
A) propanal
B)

propan kislota
C) propandiol-1,2
D) propanol-1
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June 11, 13:52
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Metanga nisbatan zichligi 1,875 bo’lgan CO va noma’lum gazdan iborat aralashmada gazlarning massalari teng. Noma’lum gazni toping?
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June 11, 13:52
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300 mol O2 CO bn reaksiyaga kirishdi. Hosil bo'lgan CO2 bilan ortib qolgan O2 teng bòlsa, hosil bo'lgan gazni miqdorini aniqlang?
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June 11, 13:52
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Ushbu oksid odatdagi sharoitda qattiq bo'lib, ishqor bilan reaksiyaga kirishadi. Kuchli kislotalar bilan kirishmaydi. Boksit va nefelin tarkibiga kiradi bu qaysi element?

Al
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June 11, 13:52
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Kremniy va uglerodga natriy gidroksidning 200 gr 20% li eritmasi bilan reaksiyaga kirishdi.  Erimagan qoldiq konsentrlangan H2SO4 bn reaksiyaga kirishdi. Ikkala jarayonda ham bir xil hajm gaz ajraldi. Dastlabki metalmaslarni umumiy massasini aniqlang.
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Bunyod Raxmanov
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