ULANGAN UJIAN SETARA 2

Antara berikut, yang manakah formula kimia yang betul bagi sebatian?

Which of the following chemical formulae for compounds is correct?

• A

• B

• C

• D

Pasangan yang manakah menunjukkan ion dan formula ionnya dengan betul?

Which pair shows the ion and its ionic formula correctly?

• A

• B

• C

• D

Formula kimia bagi kuprum (I) oksida ialah?

Chemical formula of copper (I) oxide is?

• A

• B

• C

• D

3. Logam X membentuk sebatian oksida dengan formula kimia X2O. Jika formula bagi ion manganate (VII) ialah MnO4-, apakah formula kimia manganate bagi X?
   Metal X forms an oxide compound with the chemical formula of X2O. If the formula of manganate (VII) ion is MnO4-, what is the chemical formula of manganate of X?

• A

• B

• C

• D

Antara berikut, yang manakah logam X?

Which of the following is metal X?

• Zink

  Zinc

• Kuprum

  Copper

• Magnesium

  Magnesium

• Alumina

  Aluminium

Antara berikut, logam manakah boleh menggantikan magnesium?

Which of the following metal can replace magnesium?

• Natrium

  Sodium

• Zink

  Zinc

• Plumbum

  Lead

• Stanum

  Tin

7. 2.7 g unsur X bertindak balas dengan 2.4 g unsur Y untuk membentuk sebatian dengan formula empiric X2Y3. Berapakah jisim atom relatif bagi Y? [Jisim atom relatif: X=27]
   2.7 g of element X reacts with 2.4 g of element Y to form a substance with the empirical formula of X2Y3. What is the relative atomic mass of Y? [Relative atomic mass: X=27]?

• 8

• 16

• 24

• 31

Antara yang berikut, yang manakah benar apabila 1 mol kalsium karbonat terurai? [Jisim atom relatif: C=12, O=16, Ca=40, isi padu molar gas=24 dm³ mol^-1 pada keadaan bilik]

Which of the following is correct when 1 mol of calcium carbonate is decomposed?

[Relative atomic mass: C=12, O=16, Ca=40, molar volume of gas= 24dm³ mol^-1 at room condition]

• 3 mol karbon dioksida terbebas

  3 mol of carbon dioxide is released

• 56 g kalsium oksida terbentuk

  56 g of calcium oxide is formed

• 3 molekul karbon dioksida terbebas

  3 molecules of carbon dioxide is released

• 72 dm³ karbon dioksida terbebas

  72 dm³ of carbon dioxide is released

Apakah formula empiric metal benzoat?

[Jisim atom relatif: C=12, H=1, O=16]

What is the empirical formula of methyl benzoate?

[Relative atomic mass: C=12, H=1, O=16]

• CHO₅

• C₅H₅O₈

• C₃H₃O₈

• C₄H₄O

Antara yang berikut, yang manakah betul mengenai perubahan sifat unsur apabila merentasi kala dalam Jadual Berkala Unsur?

Which of the following is the correct change in the property of elements across the period in the Periodic Table of Elements?

• Jejari atom meningkat

  The atomic radius increases

• Bilangan proton dalam setiap atom meningkat

  The number of protons in each atom increases

• Bilangan elektron valens dalam setiap atom berkurang

  The number of valence electrons in each atom decreases