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Sarawak Trial 2024 Chemistry Kertas 1 · Kenyalang Set 1

Chemistry

Sarawak Trial 2024 Chemistry Kertas 1 · Kenyalang Set 1

  • Sarawak 州试卷 Kenyalang Set 1
  • 40 题
  • 附解析
1
Which of the following is an element?
2
Diagram 1 shows the standard representation of a magnesium atom: $^{24}_{12}\text{Mg}$ What is the number of valence electrons of the atom?
3
Which of the following statements explains most accurately why carbon-12 was chosen as the standard reference for determining relative atomic mass?
4
Which of the following is the use of the iodine-131 isotope?
5
Which of the following statements are correct about the physical properties of Group 18 elements when going down the group? I The intensity of colour decreases II The forces of attraction between atoms increase III The density of the elements decreases IV The melting and boiling points of the elements increase
6
Diagram 2 shows the apparatus set-up of an experiment to study the reactivity of Group 1 elements towards chlorine gas. What are alkali metals X, Y and Z? | | X | Y | Z | |---|---|---|---| | A | Lithium | Sodium | Potassium | | B | Sodium | Potassium | Lithium | | C | Sodium | Lithium | Potassium | | D | Potassium | Sodium | Lithium |
7
The oxide of Y is a white solid that is insoluble in water but can react with nitric acid and sodium hydroxide solution. What is element Y?
8
Table 1 shows the positions of elements W, X, Y and Z in the Periodic Table of Elements. | Element | W | X | Y | Z | |---|---|---|---|---| | Group | 1 | 16 | 17 | 14 | | Period | 2 | 2 | 3 | 2 | Which pair of elements forms a compound with a high melting point?
9
Diagram 3 shows a type of bond. Which of the following is correct about the bond?
10
Which of the following statements is correct about simple molecules?
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