SPM Chemistry 2026 Kuala Lumpur Trial TOP 5 Kertas 1 – 40 Questions with Answers

1

Diagram 1 shows a part of the steps in a scientific method. What is the step X?

A Interpreting data B Making an inference C Making a hypothesis D Identifying the problem

2

The following statements refer to the contributions of a scientist in the development of the atomic structure. - Discovered positively charged particles. - Electrons are randomly distributed within the sphere. Who made the discovery?

A Neils Bohr B J. J. Thomson C James Chadwick D Ernest Rutherford

3

A compound with formula X₂(SO₄)₃ has a relative formula mass of 342. What is the relative atomic mass of X? [Relative atomic mass: O = 16, S = 32]

A 23 B 27 C 54 D 64

4

Table 1 shows the observations obtained when alkali metals, P, Q and R are burned in separate gas jars containing oxygen gas. | Alkali metal | Observation | |---|---| | P | Burns brightly | | Q | Burns very brightly | | R | Glows brightly | Which of the following is correct based on the increasing order of atomic size of atoms P, Q and R?

A Q, P, R B Q, R, P C R, Q, P D R, P, Q

5

Diagram 2 shows the electron arrangement of a chemical compound. What are the electron arrangements of atom X and Y?

A Atom X: 2.3; Atom Y: 1 B Atom X: 2.3; Atom Y: 2 C Atom X: 2.5; Atom Y: 1 D Atom X: 2.5; Atom Y: 2

6

Gastritis occurs when stomach acid is produced excessively and subsequently risks eroding of the protective lining of the stomach wall. This causes the patient to experience inflammation, pain and discomfort in the stomach. Diagram 3 shows the antiacid prescribed by the doctor. What is substance X?

A Iodine B Sodium chloride C Copper(II) sulphate D Magnesium hydroxide

7

Diagram 4 shows the curve I obtained when 1.0 g of calcium carbonate chips reacts with excess sulphuric acid at 40 °C. Which of the following will produce curve II?

A Using 2.0 g of calcium carbonate chips B Using 1.0 g of calcium carbonate powder C Adding distilled water to the sulphuric acid D Decreasing the temperature of sulphuric acid to 30 °C

8

Diagram 5 shows the equipment made from an alloy. Which of the following is the correct match about the alloy?

A Main component: Copper; Foreign atom: Tin B Main component: Tin; Foreign atom: Antimony and copper C Main component: Iron; Foreign atom: Chromium, nickel and carbon D Main component: Aluminium; Foreign atom: Copper, magnesium and manganese

9

Table 2 shows standard electrode potential values of a few substances that are used to build a chemical cell. | Half cell equation | E⁰ (V) (298 K) | |---|---| | Z²⁺ + 2e⁻ ⇌ Z | -0.14 | | Y²⁺ + 2e⁻ ⇌ Y | -0.44 | | X²⁺ + 2e⁻ ⇌ X | -0.76 | | W²⁺ + 2e⁻ ⇌ W | -2.38 | Which of the following pairs of metals and the terminals is matched correctly?

A Pairs of metals: W and X; Positive terminal: W; Negative terminal: X B Pairs of metals: X and Y; Positive terminal: X; Negative terminal: Y C Pairs of metals: Y and Z; Positive terminal: Y; Negative terminal: Z D Pairs of metals: W and Z; Positive terminal: Z; Negative terminal: W

10

Diagram 6 shows the apparatus set-up for a reaction to produce gas P. Which of the following statements explain about gas P? I Can undergo substitution reaction II Can decolourise brown bromine water III Has carboxylate as functional group IV Burn completely in the air to produce carbon dioxide gas and water

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

Kuala Lumpur Trial 2026 Chemistry Kertas 1 · TOP 5

Kuala Lumpur Trial 2026 Chemistry Kertas 1 · TOP 5

Kuala Lumpur Trial 2026 Chemistry Kertas 1 · TOP 5

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