7-sinf kimyo kursining asosiy tushunchalarini takrorlash — Dastlabki kimyoviy tushuncha va qonunlar — 8-sinf Kimyo test savollari

1.Kimyoviy hodisalarda moddaning bo'linmaydigan eng kichik zarrasi nima deb ataladi?

• A)Molekula
• B)Atom
• C)Ion
• D)Element

2."Atom" so'zi qadimgi yunon tilida qanday ma'noni anglatadi?

• A)Bo'linmas
• B)Kichik
• C)Zarracha
• D)Ko'rinmas

3.Vodorodning lotincha nomi qanday va uning ma'nosi nima?

• A)Oxygenium — kislorod hosil qiluvchi
• B)Carbonium — ko'mir hosil qiluvchi
• C)Hydrogenium — suv hosil qiluvchi
• D)Nitrogenium — azot hosil qiluvchi

4.1 m.a.b. (modda atom birligi) necha grammga teng?

• A)1,67 $\cdot$10 –24 g
• B)6,02 $\cdot$10 23 g
• C)2,657 $\cdot$10 –23 g
• D)1,66 $\cdot$10 –24 g

5.Moddaning nisbiy molekular massasiga son jihatidan teng va grammlarda ifodalangan qiymat nima deyiladi?

• A)Absolut massa
• B)1 mol
• C)Valentlik
• D)Modda miqdori

6.Kislorod atomining absolut massasi 2,657 $\cdot$ 10–23 g. 1 m.a.b. 1,66 $\cdot$ 10–24 g ekanini hisobga olib, kislorod atomining nisbiy atom massasi (Ar) qanday topiladi va u nechaga teng?

• A)Absolut massani 1 m.a.b.ga bo'lish orqali, Ar = 16
• B)Absolut massani 1 m.a.b.ga ko'paytirish orqali, Ar = 44
• C)1 m.a.b.ni absolut massaga bo'lish orqali, Ar = 0,06
• D)Absolut massadan 1 m.a.b.ni ayirish orqali, Ar = 24

7.0,301 $\cdot$ $10^{23}$ ta kislorod atomining massasini hisoblashda nisbatlar usuli qo'llanilgan: 6,02$\cdot$$10^{23}$ ta atom 16 g bo'lsa, 0,301$\cdot$$10^{23}$ ta atom necha gramm bo'ladi?

• A)1,6 g
• B)16 g
• C)0,8 g
• D)8 g

8.$H_{2}S{O}_4$ formulasidagi elementlarning nisbiy atom massalari H=1, S=32, O=16 bo'lsa, sulfat kislotaning nisbiy molekular massasi (Mr) qanday hisoblanadi?

• A)1 + 32 + 16 = 49
• B)1$\cdot$2 + 32$\cdot$4 + 16 = 146
• C)1$\cdot$2 + 32 + 16$\cdot$2 = 66
• D)1$\cdot$2 + 32 + 16$\cdot$4 = 98

9.12 gramm uglerod (12C izotopi) tarkibida nechta atom borligi 1 mol tushunchasining asosini tashkil qiladi?

• A)1,66 $\cdot$ 10 –24 ta
• B)6,02 $\cdot$ 10 23 ta
• C)1 $\cdot$ 10 24 ta
• D)12 $\cdot$ 10 23 ta

10.49 g H2SO4 (M=98 g/mol) dagi modda miqdorini $N=\frac{m}{M}$ formulasi bo'yicha hisoblang.

• A)0,5 mol
• B)2 mol
• C)4802 mol
• D)0,02 mol