SPM Chemistry 2023 Johor Trial Pasir Gudang · Set 1 Kertas 1 – 40 Questions with Answers

Diagram 1 shows the arrangement of particles of a substance that undergoes a change in physical state through process Y at room temperature. Which of the following substances undergoes process Y?

A Chlorine B Bromine C Iodine D Oxygen

Which of the following is an example of matter?

A Heat B Air C Light

Which of the following isotopes is used to detect leaks in underground pipes?

A Carbon-14 B Uranium-235 C Sodium-24 D Iodine-131

Which of the following steps should be taken to ensure that all the magnesium reacts with oxygen and burns completely during the experiment to determine the empirical formula of magnesium oxide? I Open and close the lid quickly once in a while during heating II Heat the magnesium ribbon strongly in the crucible without its lid III Observe the white solid produced IV Repeat the heating, cooling and weighing until a constant mass is obtained

A I and II B I and III C I and IV D III and IV

Diagram 2 shows two types of gas filled in two balloons. Which statement is correct about the number of atoms in the neon gas? [Relative atomic mass: Ne = 20; O = 16]

A Same as the number of molecules in the oxygen gas B More than the number of molecules in the oxygen gas C Two times less than the number of molecules in the oxygen gas D 20 times more than the number of molecules in the oxygen gas

Diagram 3 shows substance X stored in paraffin oil. What is substance X?

A Silver B Gold C Aluminium D Sodium

Diagram 4 shows the structural formula of a compound. What is the empirical formula of the compound?

A CHO B C_3H_6O_2 C CH_2O_2 D C_2H_3O

Element X reacts with element Z to form a covalent compound with the formula XZ_4. What is a physical property of this covalent compound?

A Conducts electricity in aqueous state B Vaporises easily C Has high melting and boiling points D Dissolves in water

Which of the following is a property of ionic compounds?

A Does not dissolve in water B Dissolves in organic solvents C High melting and boiling points D Conducts electricity in solid state

Diagram 5 shows the molecular structures of covalent compounds A and B. Which of the following statements is **incorrect** about the two compounds?

A A: Example: diamond; B: Example: carbon dioxide B A: Giant structure; B: Simple structure C A: Strong covalent bonds in the molecules only and there are no van der Waals attraction forces; B: Covalent bonds are weak in the molecules and the van der Waals attraction forces between molecules are weak D A: Higher melting point because a lot of heat is required to break the strong covalent bonds; B: Lower melting point because only a little heat is required to overcome the weak van der Waals attraction forces between molecules

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Johor Trial 2023 Chemistry Kertas 1 · Pasir Gudang · Set 1

Johor Trial 2023 Chemistry Kertas 1 · Pasir Gudang · Set 1

Johor Trial 2023 Chemistry Kertas 1 · Pasir Gudang · Set 1

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