7-kimyo-3-v

umumta’lim maktabining 2023-2024-o‘quv yili uchun kimyo fanini o‘zlashtirish darajasini aniqlash uchun test, savol, masala va topshiriqlar 7-___sinf o‘quvchisi ____________________________________ f.i.sh. o‘quvchi to‘plagan umumiy ball:_____ 3-variant 1.azot (v) oksidining (n2o5) molekulyar formulasidan foydalanib nisbiy molekulyar massasini aniqlang. a) 24 b) 80 c) 108 c) 30 2.azotning molekulyar massasini aniqlang. formulasi:n2 a) 28 b) 26 c) 14 d) 45 3. moddalarning nechta agregat xolati mavjud? a) gaz b) suyuq c) qattiq d) gaz,suyuq, gaz 4. suvning formulasi qanday ? a) h2o b) o2 c) n2 d) h2 5. havoning tarkibidagi eng muhim gazlar qaysilar? a) azot, kislorod b) azot c) vodorod d) kislorod 6. al bu qaysi elementning belgisi? a) temir b) alyuminiy c) xlor d) azot 7. osh tuzini suvda eri...

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