kimyo-29(javobli)

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 29-dtm standart test nurlan  ikromovichdan 1. su 2+ ionidagi s – va d – elektronlar sonini hisoblang. a) 7; 10 b) 8; 9 c) 5; 10 d) 6; 9 2. qaysi javobda elementlar elektromanfiyligi ortib borish tartibida joylashgan? a) c, si, ge, pb, sn b) li, na, k, rb, cs c) i, br, cl, f, h d) na, mg, al, p, cl 3. kremniy atomida n va l yig’indisi 3, ms = +0,5 bo’lgan eng ko’pida nechta elektron mavjud a) 4 b) 2 c) 3 d) 9 4. 1 molekula pikrin kislota tarkibidagi barcha atomlar sonini aniqlang a) 19 b) 18 c) 17 d) 20 5. 229pa → pb + xα + y–𝛽 0 + 50𝑛 1 yadro reaksiyasi asosida 45,8 gr protaktiniy izotopi parchalanganda pb ning neytronlar soni pa nikidan 4 ⦁ na ga kam bo‘lsa, hosil bo‘lgan elektronlar miqdorini (mol) toping. a) 0,4 b) 0,5 c) …

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tsiya – 1 kg erituvchiga to'g'ri keladigan erigan moddaning mol miqdori.) a) 16 b) 20 c) 8 d) 10 12. 600 ml agno3 (c = 0,05 mol/l) va 400 ml nacl (s = 0,1 mol/l) eritmalari aralashtirildi. eritmadan cho'kma ajratib olingach, barcha ionlar konsentratsiyasini (mol/l) hisoblang. 1) ag+ ; 2) no3 – 3) na+ ; 4) sl– a) 0,02; b) 0,03; c) 0,04; d) 0,01. a) 3–c; 4–b; 2–b b) 3–c; 4–d; 2–b c) 3–c; 4–d; 2–b; 1–b d) 3–c; 4–d; 2–b; 1–a 13. 10 % li tuz eritmasi bug‘lanishi natijasida to‘yingan eritma (s = 25) hosil bo‘ldi. bunda 1 g tuz cho‘kmaga tushdi va eritma massasi 4 marta kamaydi. bug'langan suv massasini (g) aniqlang. a) 5 b) 14 c) 6 d) 15 14. qishloq xo‘jaligida akaritsidlar qanday maqsadda ishlatiladi? a) kapalaklarga qarshi b) zararli kemiruvchilarga qarshi c) kasallik tarqatuvchi zamburugllarga qarshi d) begona o’tlarga qarshi 15. 11,2 litr is …

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 29-dtm standart test nurlan  ikromovichdan 1. su 2+ ionidagi s – va d – elektronlar sonini hisoblang. a) 7; 10 b) 8; 9 c) 5; 10 d) 6; 9 2. qaysi javobda elementlar elektromanfiyligi ortib borish tartibida joylashgan? a) c, si, ge, pb, sn b) li, na, k, rb, cs c) i, br, cl, f, h d) na, mg, al, p, cl 3. kremniy atomida n va l yig’indisi 3, ms = +0,5 bo’lgan eng ko’pida nechta elektron mavjud a) 4 b) 2 c) 3 d) 9 4. 1 molekula pikrin kislota tarkibidagi barcha atomlar sonini aniqlang a) 19 b) 18 c) 17 d) 20 5. 229pa → pb + xα + y–𝛽 0 + 50𝑛 1 yadro …

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