Uy » Online olimpiada » Kimyo olimpiada » 9-sinf Kimyo olimpiada №4 Kimyo olimpiada 9-sinf Kimyo olimpiada №4 InfoMaster Yanvar 5, 2023 638 Ko'rishlar 1 izoh SaqlashSaqlanganOlib tashlandi 2 0 12345678910111213141516171819202122232425 Vaqtingiz tugadi! 9-sinf Kimyo olimpiada №4 03.01.2023 yil oo.uzedu.uz Online olimpiada savollari! 1 / 25 CrO42- + xH2O + ye- → [Cr(OH)6]3- + zOH- yarim-reaksiyadagi x, y, z koeffisientlarni aniqlang. (uchala koeffisient to‘g‘ri bo‘lgandagina javob inobatga olinadi). x = 2, y = 3, z = 4 x = 3, y = 4, z = 2 x = 4, y = 2, z = 3 x = 4, y = 3, z = 2 2 / 25 Galogenid kislotaning 1,4 M li eritmasining titri 113,4 mg/ml ga teng. Galogenid kislotani aniqlang. HJ HF HCl HBr 3 / 25 Tarkibida 80% suv saqlagan 100 g NaOH eritmasini bug’latib, tarkibida 5% suv saqlagan eritmadan necha gramm olish mumkin? 31 54 40 21 4 / 25 Quyida molekulaning elektron tuzilishi berilgan: CO₂ OF₂ N₂O H₂O 5 / 25 Quyidagi qaysi elementdan tashqari barcha elementlar allatropiyani namoyon qiladi? C Kr O S 6 / 25 D B C A 7 / 25 D B C A 8 / 25 C A B D 9 / 25 A B D C 10 / 25 A C B D 11 / 25 C B A D 12 / 25 C D A B 13 / 25 C A D B 14 / 25 C B A D 15 / 25 C B A D 16 / 25 A C D B 17 / 25 D A B C 18 / 25 A C B D 19 / 25 A D B C 20 / 25 B D C A 21 / 25 A C D B 22 / 25 A C B D 23 / 25 A D B C 24 / 25 B C A D 25 / 25 D C B A 0% Author: InfoMaster Foydali bo'lsa mamnunmiz
