SPM Chemistry 2023 Perak Trial Set 1 Kertas 1 – 40 Questions with Answers

1

Diagram 1 shows a safety equipment in the laboratory. What is the function of the safety equipment?

A A specially designed equipment to carry out experiments that release toxic vapours, flammable substances or pungent smells B Used to wash and clean the body when an accident occurs on parts of the body C Used to remove chemical substances, oil, dirt and microorganisms from the hands D Used for extinguishing fire in the laboratory

2

Diagram 2 shows the formation of dew on the leaves in the morning. What is the process and energy change involved during the formation of dew in Diagram 2? | | Process | Energy change | |---|---|---| | A | Evaporation | Energy absorbed | | B | Evaporation | Energy released | | C | Condensation | Energy absorbed | | D | Condensation | Energy released |

A A B B C C D D

3

The mass of one atom of element Y is two times more than an atom of chlorine. What is the relative atomic mass of element Y? [Relative atomic mass: Cl = 35.5]

A 17.5 B 24.0 C 35.5 D 71.0

4

Which of the following statements are correct about the physical properties of elements in Group 18 when going down the group? I The intensity of colour decreases II The attraction force between atoms increases III The density of these elements decreases IV The melting point and boiling point of these elements increase

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

5

Which statement is not a special characteristic of transition elements?

A Act as catalyst B High melting and boiling points C Form coloured compounds D Have more than one oxidation number

6

Diagram 3 shows a type of bond. $$\text{H}_2\text{O} + \text{H}^+ \rightarrow \text{H}_3\text{O}^+$$ Which of the following is correct about the bond?

A The force of attraction between hydrogen atoms that have bonded with an atom of high electronegativity in another molecule B A type of bond where there is an electrostatic attraction force between the sea of electrons and the positively-charged metal ions C A type of bond where the electron pairs shared come from one atom only D A bond that is formed through the transfer of electrons between metal atoms and non-metal atoms

7

Which of the following are the physical characteristics of salt crystals? I Have the same volume II Have flat surfaces and straight sides III Have the same size with the same density IV Have a specific geometrical shape

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

8

Which of the following is a weak alkali?

A Aluminium hydroxide, $\text{Al(OH)}_3$ B Ammonium hydroxide, $\text{NH}_4\text{OH}$ C Barium hydroxide, $\text{Ba(OH)}_2$ D Potassium hydroxide, KOH

9

Which of the following ceramics is correctly matched to its use?

A Kaolin — Brake discs B Silicon carbide — Magnetic Resonance Imaging (MRI) machine C Zirconia — Dental implants D Alumina — Engine component

10

The following are the characteristics of a substance needed to produce a new product in industry. - No electrical resistance - Works under extremely low temperatures - Transfers information at high speed What are the substances that can be used to produce the product? I Ceramics II Superconductor III Fibre optic IV Fibre glass

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

Perak Trial 2023 Chemistry Kertas 1 · Set 1

Perak Trial 2023 Chemistry Kertas 1 · Set 1

Perak Trial 2023 Chemistry Kertas 1 · Set 1

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