Metallmaslar — Ekvivalent qonuni — 8-sinf Kimyo test savollari

1.Elementning ekvivalenti deb nimaga aytiladi?

• A)1 g vodorod bilan birikadigan miqdoriga
• B)Elementning atom massasiga
• C)Elementning valentligiga
• D)Elementning molyar hajmiga

2.Vodorod atomining ekvivalent massasi nechaga teng?

• A)8 g/mol
• B)1 g/mol
• C)16 g/mol
• D)2 g/mol

3.Ekvivalentlik tushunchasi fanga qachon va kim tomonidan kiritilgan?

• A)1811-yilda I.Shveyger tomonidan
• B)1869-yilda Mendeleyev tomonidan
• C)1820-yilda ingliz olimi Vollaston tomonidan
• D)1774-yilda Sheyele tomonidan

4.Element nisbiy atom massasi uning valentligiga nisbati nima deyiladi?

• A)Molyar massa
• B)Molyar hajm
• C)Oksidlanish darajasi
• D)Elementning ekvivalenti

5.Ekvivalentlar qonunining matematik ifodasi m(A)/m(B) qanday nisbatga teng?

• A)E(A)/E(B) ga
• B)M(A)/M(B) ga
• C)V(A)/V(B) ga
• D)n(A)/n(B) ga

6.Temirning ikki valentli birikmalaridagi ekvivalenti E(Fe)$=\frac{56}{2}$ formulasi bo'yicha nechaga teng?

• A)56 g/mol
• B)28 g/mol
• C)18,67 g/mol
• D)14 g/mol

7.Temirning uch valentli birikmalaridagi ekvivalenti E(Fe)$=\frac{56}{3}$ formulasi bo'yicha taxminan nechaga teng?

• A)28 g/mol
• B)56 g/mol
• C)18,67 g/mol
• D)9,33 g/mol

8.47,26 g mis 52,7 g xlor (E=35,45 g/mol) bilan birikkanda, E(Cu)=47,26*$\frac{35,45}{52,7}$ formulasi bo'yicha misning ekvivalenti nechaga teng?

• A)35,45 g/mol
• B)63,5 g/mol
• C)47,26 g/mol
• D)31,8 g/mol

9.Aluminiy oksidi tarkibida 52,94% Al va 47,06% O bor. $\frac{52,94}{47,06}=\frac{x}{8}$ nisbatidan aluminiyning ekvivalenti qanday topiladi?

• A)x = 8
• B)x = 16
• C)x = 27
• D)x = 9

10.Ekvivalent hajm tushunchasiga ko'ra, gazsimon holatda 1 ekvivalent $H_2$ va 1 ekvivalent $O_2$ qancha hajmni egallaydi?

• A)$H_2$ uchun 22,4 l/mol, $O_2$ uchun 11,2 l/mol
• B)$H_2$ uchun 11,2 l/mol, $O_2$ uchun 5,6 l/mol
• C)$H_2$ uchun 5,6 l/mol, $O_2$ uchun 2,8 l/mol
• D)Ikkalasi uchun ham 22,4 l/mol