Melaka Trial 2025 Kimia Kertas 1

Kimia

Melaka Trial 2025 Kimia Kertas 1

• Percubaan Melaka
• 40 soalan
• Ada penerangan

1

Table 1 shows the melting points and boiling points of several chemical substances. | Substance | Melting point (°C) | Boiling point (°C) | |---|---|---| | P | −63.5 | 61.2 | | Q | −111.6 | 12.7 | | R | −218.8 | −183 | | S | 80 | 218 | Which of the following substances is in a liquid state at room temperature?

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A P B Q C R D S

T4 Chapter 2.1 Basic Concepts of Matter

2

Which of the following is a transition element?

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A Sodium B Calcium C Zinc D Neon

T4 Chapter 4.7 Transition Elements

3

Choose the statement that describes one of the chemical properties of alkalis.

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A Reacts with ammonium salts to release ammonia gas B Produces hydrogen gas when reacting with reactive metals C Causes metal corrosion D Reacts with carbonate salts to produce carbon dioxide gas

T4 Chapter 6.4 Chemical Properties of Acids and Alkalis

4

Diagram 1 shows the electron arrangement of the X²⁺ ion. Which of the following is the position of element X in the Periodic Table of Elements?

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A A B B C C D D

T4 Chapter 4.2 The Arrangement in the Periodic Table of Elements

5

Which of the following salts is insoluble in water?

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A Lead(II) sulphate B Potassium sulphate C Copper(II) sulphate D Sodium sulphate

T4 Chapter 6.9 Preparation of Salts

6

Table 2 shows the observations on blue litmus paper in three solutions. | Solution | Observation | |---|---| | Glacial ethanoic acid | No change in the colour of blue litmus paper | | Glacial ethanoic acid + propanone | No change in the colour of blue litmus paper | | Glacial ethanoic acid + water | Blue litmus paper turns red | Based on the observations, choose the correct statement.

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A Glacial ethanoic acid is a weak acid B Propanone is a universal solvent C Litmus paper does not react with glacial ethanoic acid D Acids show their acidic properties in the presence of water

T4 Chapter 6.1 The Role of Water in Showing Acidic and Alkaline Properties

7

Which of the following substances accelerates the coagulation of rubber?

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A Ethanoic acid B Ammonia C Ethyl ethanoate D Sodium chloride

T5 Chapter 4.2 Natural Rubber

8

Diagram 2 shows the hydrogen ion and thiosulphate ion particles in experiments I and II. Which of the following statements shows the difference in the rate of reaction for the two sets of experiments?

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A The number of thiosulphate ions decreases more rapidly in experiment I B The kinetic energy of the particles in experiment I is higher C The frequency of collisions between thiosulphate ions and hydrogen ions is higher in experiment II D The activation energy in experiment II is higher

T4 Chapter 7.2 Factors Affecting Rate of Reactions T4 Chapter 7.4 Collision Theory

9

Diagram 3 shows one use of substance X in daily life. What property of substance X makes it suitable for this use?

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A Waterproof B Resistant to corrosion C Hard and strong D High tensile strength

T4 Chapter 8.1 Alloy and Its Importance

10

A resident in Kampung Sentosa made a complaint to the Water Department because his water bill increased drastically. The officer of the department found an underground water pipe leakage in the house area by using a detector. What is the substance in the detector used by the officer?

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A Carbon-14 B Cobalt-60 C Phosphorus-32 D Sodium-24

T4 Chapter 2.4 Isotopes and Its Uses

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