Kedah Trial 2023 Chemistry Kertas 1

Chemistry

Kedah Trial 2023 Chemistry Kertas 1

• Kedah Trial · 2023
• 40 questions

Answers

From the paper’s own answer key

Explanations

Written by AI — a study aid, may contain mistakes

Last updated

2026-10-29

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1

Which element exists as molecules at room temperature?

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A Water B Carbon C Oxygen gas D Sodium chloride

T4 Chapter 2.1 Basic Concepts of Matter

2

Which of the following statements is true about helium?

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A Exists as diatomic molecules B Does not dissolve in water C High melting and boiling points D Has an octet electron arrangement

T4 Chapter 4.3 Elements in Group 18

3

The table shows the pH values of four alkali solutions that have the same concentration. | Solution | U | V | W | X | |---|---|---|---|---| | pH | 9 | 10 | 12 | 14 | Which alkali solution has the highest degree of ionisation?

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A U B V C W D X

T4 Chapter 6.3 Strength of Acids and Alkalis

4

Which unit is used for the rate of reaction?

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A g mol^-1 B g min^-1 C mol dm^-3 D kJ mol^-1

T4 Chapter 7.1 Determining Rate of Reaction

5

Which of the following is a composite material?

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A Photochromic glass B Lead crystal glass C Borosilicate glass D Soda-lime glass

T4 Chapter 8.4 Composite Materials and Its Importance

6

Which set of definitions of reduction in terms of oxygen, hydrogen and electrons is correct?

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A Oxygen: Gain; Hydrogen: Loss; Electrons: Loss B Oxygen: Gain; Hydrogen: Loss; Electrons: Gain C Oxygen: Loss; Hydrogen: Gain; Electrons: Gain D Oxygen: Loss; Hydrogen: Gain; Electrons: Loss

T5 Chapter 1.1 Oxidation and Reduction

7

An example of an endothermic reaction is

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A respiration B photosynthesis C rusting of iron

T5 Chapter 3.1 Heat Change in Reactions

8

Substance R is one of the synthetic polymers used in daily life. Substance R is also used for making toys. What is substance R?

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A Teflon B Nomex C Nylon D Kevlar

T5 Chapter 4.1 Polymer

9

The diagram shows a type of plant used in traditional medicine. Which of the following is a use of the plant?

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A Treats ringworm B Prevents flu C Lowers blood pressure D Relieves burn wounds

T5 Chapter 5.4 Medicines and Cosmetics

10

Which unit is correct for molar volume?

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A g mol^-2 B g mol^-3 C dm^3 mol^-2 D dm^3 mol^-1

T4 Chapter 3.2 Mole Concept

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