Selangor Trial 2024 Chemistry Kertas 1 · Set 2

Chemistry

Selangor Trial 2024 Chemistry Kertas 1 · Set 2

• Selangor Trial Set 2
• 40 questions
• With explanations

1

Diagram 1 shows the safety equipment in the laboratory. Which of the following chemicals need to be handled inside the safety equipment shown in Diagram 1?

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A Chlorine gas B Nitric acid C Oxygen gas D Acidified potassium manganate(VII)

T4 Chapter 1.3 Usage, Management and Handling of Apparatus and Materials

2

What is the chemical formula of aluminium carbonate?

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A $\text{AlCO}_3$ B $\text{Al(CO}_3)_3$ C $\text{Al}_2(\text{CO}_3)_3$ D $\text{Al}_3(\text{CO}_3)_2$

T4 Chapter 3.3 Chemical Formula

3

Which of the following substances consists of ionic bonds?

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A Sulphur dioxide B Tetrachloromethane C Carbon monoxide D Magnesium chloride

T4 Chapter 5.2 Ionic Bond

4

Which of the following factors affect the rate of reaction? I Presence of catalyst II Mass of reactants III Number of moles IV Size of reactants

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

T4 Chapter 7.2 Factors Affecting Rate of Reactions

5

The following equation shows the reaction between copper(II) oxide and hydrogen gas. $$\text{CuO} + \text{H}_2 \rightarrow \text{Cu} + \text{H}_2\text{O}$$ What is the type of reaction that takes place for copper(II) oxide?

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A Reduction B Oxidation C Precipitation D Neutralisation

T5 Chapter 1.1 Oxidation and Reduction

6

Which of the following reactions absorbs heat from the surroundings?

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A $\text{CaCO}_3 \rightarrow \text{CaO} + \text{CO}_2$ B $\text{KOH} + \text{HCl} \rightarrow \text{KCl} + \text{H}_2\text{O}$ C $\text{C}_2\text{H}_4 + 3\text{O}_2 \rightarrow 2\text{CO}_2 + 2\text{H}_2\text{O}$ D $\text{Mg} + 2\text{HNO}_3 \rightarrow \text{Mg(NO}_3)_2 + \text{H}_2$

T5 Chapter 3.1 Heat Change in Reactions

7

Diagram 2 shows an injury of a student during sports day. What type of medicine should be taken by the student?

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A Analgesics B Antimicrobials C Corticosteroids D Psychotic drugs

T5 Chapter 5.4 Medicines and Cosmetics

8

Which of the following substances consists of molecules?

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A Zinc B Zinc nitrate C Nitrogen gas D Sodium chloride

T4 Chapter 2.1 Basic Concepts of Matter

9

Diagram 3 shows three elements in the Periodic Table of Elements. Which of the following is true about the elements?

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A Colourless B Exist as gas at room temperature C Have more than one oxidation number D Can react with water to produce hydrogen gas

T4 Chapter 4.4 Elements in Group 1

10

Diagram 4 shows the types of particles in a solution. Which of the following represents the type of solution shown?

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A Strong acid B Weak acid C Strong alkali D Weak alkali

T4 Chapter 6.3 Strength of Acids and Alkalis

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