Putrajaya Trial 2023 Chemistry Kertas 1

Chemistry

Putrajaya Trial 2023 Chemistry Kertas 1

• Putrajaya 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 of the following atomic models was presented by Niels Bohr?

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A B C D

T4 Chapter 2.2 The Development of the Atomic Model

2

A cancer patient needs to undergo radiotherapy treatment to kill cancer cells. What is the substance used in the radiotherapy equipment?

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A Iodine-131 B Cobalt-60 C Sodium-24 D Carbon-14

T4 Chapter 2.4 Isotopes and Its Uses

3

Which of the following is the correct formula of an ion?

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A $\text{Ag}^{2+}$ B $\text{Ag}^{3+}$ C $\text{Al}^{2+}$ D $\text{Al}^{3+}$

T4 Chapter 3.3 Chemical Formula

4

Which of the following substances is equal to 1 mol? [Avogadro constant = $6.02 \times 10^{23}$; Relative atomic mass: Mg = 24, Cl = 35.5; Molar volume of gas at room conditions = 24 dm³ mol⁻¹]

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A Magnesium chloride with a mass of 59.5 g B Zinc chloride containing $6.02 \times 10^{24}$ formula units C Silicon dioxide containing $6.02 \times 10^{23}$ molecules D Carbon dioxide with a volume of 2400 cm³ at room conditions

T4 Chapter 3.2 Mole Concept

5

Which characteristics are correct about elements in Group 1 of the Periodic Table going down the group? I The tendency to donate electrons increases II The hardness of the metal increases III Heat conductivity decreases IV The melting point decreases

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

T4 Chapter 4.4 Elements in Group 1

6

Diagram 1 shows the formation of ammonia boron trifluoride when ammonia, $\text{NH}_3$ reacts with boron trifluoride, $\text{BF}_3$. What type of bond is formed?

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A Dative bond B Ionic bond C Covalent bond D Hydrogen bond

T4 Chapter 5.5 Dative Bond

7

Which of the following is the correct term for a chemical substance that ionises partially in water to produce a low concentration of hydroxide ions?

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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

8

Which of the following statements is correct about a catalyst?

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A A catalyst can increase the quantity of product formed B A catalyst does not change its physical state after the reaction C A catalyst increases the activation energy of a reaction D Only a small amount of catalyst is required to speed up a reaction

T4 Chapter 7.2 Factors Affecting Rate of Reactions

9

Photochromic glass is a composite material that is used in the manufacture of car windows and building windows. Which of the following are the substances added to glass to make photochromic glass? I Copper(I) chloride II Iron(II) chloride III Silver chloride IV Barium chloride

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

T4 Chapter 8.4 Composite Materials and Its Importance

10

Diagram 2 shows a pressure cooker. Which of the following glass is used in part X?

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A Borosilicate glass B Lead crystal glass C Soda-lime glass D Fused silica glass

T4 Chapter 8.2 Composition of Glass and Its Uses

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