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Which of the following substances consist of atoms?

Antara berikut bahan manakah terdiri daripada atom?

• Magnesium

• Oxygen

• Lead (II) bromide

• Naphthalene

Why carbon-12 was chosen as a reference standard for relative atomic mass and relative molecular mass?

Mengapakah karbon-12 telah dipilih sebagai rujukan piawai untuk jisim atom relatif dan jisim molekul relatif?

• Carbon has three isotopes

  Karbon mempunyai tiga isotop

• Carbon is non-metal element

  Karbon merupakan unsur bukan logam

• Carbon is a solid and easier to be handle

  Karbon adalah pepejal dan lebih senang dikendalikan

• Carbon is located in Group 14 in the Periodic Table of Elements

  Karbon terletak dalam Kumpulan 14 dalam Jadual Berkala Unsur

Which of the following particles equal to 1 mole?

Antara zarah yang berikut, yang manakah bersamaan

dengan 1 mol?

• The number of atom in 1 g of hydrogen gas

  Bilangan atom dalam 1 g gas hidrogen

• The number of molecule in 1 g of hydrogen gas

  Bilangan molekul dalam 1 g gas hidrogen

• 6.02 x 10²³ of hydrogen atoms in hydrogen gas

  6.02 x 10²³ atom hidrogen dalam gas hidrogen

• 6.02 x 10²³ of hydrogen molecule in hydrogen gas

  6.02 x 10²³ molekul hidrogen dalam gas hidrogen

Which of the following gases contains 0.4 mol of atoms at room temperature and pressure?

[1 mol of gas occupies the volume of 24 dm³ at room temperature and pressure]

Antara gas berikut, yang manakah mengandungi 0.4 mol atom pada suhu dan tekanan bilik?

[1 mol gas menepati isipadu sebanyak 24 dm³ pada suhu dan tekanan bilik]

• 4.8 dm³ He

• 4.8 dm³ H₂

• 4.8 dm³ SO₃

• 4.8 dm³ CO₂

Which of the following gases exists as a monoatom?

• Neon gas

• Oxygen gas

• Nitrogen gas

• Carbon dioxide gas

Which characteristics is correct about elements in Group 1 in the Periodic Table as going down the group?

Ciri manakah yang betul tentang unsur-unsur dalam Kumpulan 1 dalam Jadual Berkala Unsur apabila menuruni kumpulan?

• The tendency to release electron decreases

  Kecenderungan menerima elektron berkurang

• The reactivity decreases

  Kereaktifan berkurang

• All are conductor of heat

  Semua adalah konduktor haba

• All insoluble in water

  Semua tidak larut dalam air

Which of the following substances can act as an electrolyte?

• Conducts heat only in the molten state

• Conducts electricity in the molten and aqueous states

• Conducts electicity in the solid state

• Conducts electricity only in the liquid state

Which of the following substances is a monoprotic acid?

• Propanoic acid, C₂H₅COOH

• Phosphoric acid, H₃PO₄

• Sulphuric acid, H₂SO₄

• Carbonic acid, H₂CO₃

Which of the following salts can be prepared by the double decomposition method?

• Magnesium sulphate

• Ammonium chloride

• Copper(II) nitrate

• Lead (II) iodide

Which of the following statements is true for both methanol and propanol?

• Have different chemical properties

• Have similar physical properties

• Both have same functional group

• Both have one similar chemical formula