Uy » Online olimpiada » Kimyo olimpiada » 8-sinf Kimyo olimpiada №2 Kimyo olimpiada 8-sinf Kimyo olimpiada №2 InfoMaster Dekabr 16, 2022 21 Ko'rishlar 2 izohlar SaqlashSaqlanganOlib tashlandi 0 0 12345678910111213141516171819202122232425 Vaqtingiz tugadi! 8-sinf Kimyo olimpiada №2 08.12.2022 yil oo.uzedu.uz Online olimpiada savollari! 1 / 25 Qaysi elementlar allotropic o’zgarishga ega emas? H, C, N F, Cl, Br O, C, P Fe,C,Na 2 / 25 Laboratoriyada xlor gazi qanday moddalardan olinadi? NaCl, H₂O HCl, NaCl, KOH KClO, HCl,KCl KMnO₄, HCl, MnO₂ 3 / 25 Quyidagi ifodalardan qaysilari davriy jadvaldagi elementlar uchun noto’g’ri. 1) guruh bo’ylab elektromanfiylik qiymati ortadi 2) davr bo’ylab elektronga moyillik kamayadi 3) guruh bo’ylab ionlanish potensiali kamayadi. 4) davr bo’ylab metallik xossasi kamayadi 2,3 1,4 3,4 1,2 4 / 25 Quyidagi moddalarni tarkibida (a) qutbli kovalent (b)qutbsiz kovalent (c) donor –akseptor (d) ionli bog’lari bor bo’lganlarini aniqlang 1)N2 2)NH+4 3)CO 4)Mg CO3 5)H2 C2 O4 6)Ba(NO3 )2 a-2.3.4.5.6 b-1 c-2.3.6. d-4.6 a-2.3.4.5.6 b-1 c-2.3. d-4.6 a-2.3.4.5.6 b-1.5 c-2.3.6. d-4.6 a-2.3.4.5.6 b-1.5 c-2.3. d-4.6 5 / 25 Osh tuzining qaynash haroratini aniqlang. 1413°C 50°C 500°C 90000°C 6 / 25 D A B C 7 / 25 B D A C 8 / 25 D A B C 9 / 25 D B A C 10 / 25 A B D C 11 / 25 D B A C 12 / 25 C A D B 13 / 25 B A C D 14 / 25 D A C B 15 / 25 B D A C 16 / 25 C D B A 17 / 25 D C B A 18 / 25 B C D A 19 / 25 B D A C 20 / 25 A B D C 21 / 25 D A B C 22 / 25 B C D A 23 / 25 B A D C 24 / 25 B A C D 25 / 25 B A C D 0% Testni qayta ishga tushiring Tomonidan Wordpress Quiz plugin Author: InfoMaster Foydali bo'lsa mamnunmiz