1 Which of the following substances exist as molecule at room condition? star A Iodine B Helium C Carbon D Calcium T4 Chapter 4.5 Elements in Group 17
2 Which of the following is matched correctly? star A Sodium-24: Detector to study sewage B Lead-210: Estimation of the age of artifacts C Cobalt-60: Sterilising surgical tools D Iodine-131: Detect leakage in underground pipes T4 Chapter 2.4 Isotopes and Its Uses
3 What is the chemical formula of iron(III) oxide? star A FeO3 B Fe3O C Fe2O3 D Fe3O2 T4 Chapter 3.3 Chemical Formula
4 Diagram 1 shows the apparatus set-up to determine the empirical formula of a metal oxide. What is the purpose of lifting the crucible lid at interval during heating process? star A Ensure magnesium melt B Obtain a constant mass of magnesium oxide C Prevent fume of magnesium oxide from escaping D Allow oxygen to enter to react with magnesium T4 Chapter 3.3 Chemical Formula
5 The following are the characteristics of elements Q and R. - Form complex ion - Form coloured compound - Has more than one oxidation number What are Q and R? I Chromium II Iron III Caesium IV Barium star A I and II B I and IV C II and III D III and IV T4 Chapter 4.7 Transition Elements
6 Which of the following is matched correctly? star A Glycerol, C3H5(OH)3: Covalent B Chloropicrin, CCl3NO2: Ionic C Sodium chlorate(V), NaClO3: Covalent D Paracetamol, C8H9NO2: Ionic T4 Chapter 5.1 Basics of Compound Formation T4 Chapter 5.2 Ionic Bond T4 Chapter 5.3 Covalent Bond
7 Which substance has the pH value more than 3? star A Acid which is used in batteries B Acid that is used in the making of pickles C Acid present in the lemon D Acid present in the gastric juice T4 Chapter 6.2 pH Value
8 Which of the following methods will not increase the rate of reaction between zinc granules and hydrochloric acid? star A Use zinc powder B Heat the hydrochloric acid C Put catalyst into the mixture D Add water into hydrochloric acid T4 Chapter 7.2 Factors Affecting Rate of Reactions
9 Which of the following elements are the composition of steel? I Iron II Zinc III Copper IV Carbon star A I and II B I and IV C II and III D III and IV T4 Chapter 8.1 Alloy and Its Importance
10 What are part of the components in borosilicate glass besides silicon dioxide? star A Aluminium oxide and sodium carbonate B Boron oxide and copper(I) chloride C Calcium oxide and silver chloride D Lead(II) oxide and calcium carbonate T4 Chapter 8.2 Composition of Glass and Its Uses
11 In thermite reaction, iron is extracted from its ore using aluminium. Which of the following metals can be extracted from its ore using the same reaction? star A Gold B Chromium C Silver D Magnesium T5 Chapter 1.5 Extraction of Metal from Its Ore
12 Diagram 2 shows the apparatus set up for a dehydration reaction. What are S and T? star A S: Ethanoic acid, T: Ethane B S: Ethanoic acid, T: Ethene C S: Ethanol, T: Ethane D S: Ethanol, T: Ethene T5 Chapter 2.3 Chemical Properties and Interconversion of Compounds Between Homologous Series
13 Which reaction has positive "ΔH"? star A Dilute sulphuric acid is added to sodium hydroxide solution B Zinc powder is reacted with copper(II) sulphate solution C Calcium carbonate is heated strongly D A piece of potassium is put into water T5 Chapter 3.1 Heat Change in Reactions
14 Diagram 3 shows a type of polymer. Which of the following substances is the example of the polymer? star A Nylon B Bakelite C Polyethene D Polyurethane T5 Chapter 4.1 Polymer
15 Sorbitol is an example of food additive. Which of the following substances has the same function as sorbitol? star A Monosodium glutamate B Ascorbic acid C Monoglycerides D Acacia gum T5 Chapter 5.3 Food Additives
16 Which of the following inter-conversions of matter causes the kinetic energy of particles increases? star A Ice -> Steam B Water -> Ice C Steam -> Water D Steam -> Ice T4 Chapter 2.1 Basic Concepts of Matter
17 Which of the following substances has the correct empirical formula? star A Butanoic acid: C4H8O2 B Ethyl ethanoate: C2H4O2 C Glucose: C6H12O6 D Pentanol: C5H12O T4 Chapter 3.3 Chemical Formula
18 The following are the properties of three elements in Period 3 of the Periodic Table of Elements. P : Metal which has high boiling point Q : Gas that provides an inert atmosphere for welding at high temperature R : Semi-metal used to make semiconductor Which of the following arrangement is correct for the elements in ascending order of atomic size in The Periodic Table of Elements? star A P, Q, R B P, R, Q C Q, R, P D R, P, Q T4 Chapter 4.6 Elements in Period 3
19 Which of the following substances need to be added to propanoic acid solution to produce sodium propanoate salt? star A Sodium solid B Sodium carbonate solid C Sodium hydroxide solution D Sodium nitrate solution T4 Chapter 6.9 Preparation of Salts
20 Diagram 4 shows the electron arrangement of a compound. Which of the following elements can react with chlorine to produce another compound which has different type of particles with the compound? I Lithium II Beryllium III Carbon IV Hydrogen star A I and II B I and IV C II and III D III and IV T4 Chapter 5.1 Basics of Compound Formation T4 Chapter 5.3 Covalent Bond
21 Which of the following statements is correct to describe why solid sodium chloride cannot conduct electricity but molten sodium chloride able to conduct electricity? star A The ions in solid sodium chloride cannot move freely but can move freely when melted B There is a strong electrostatic force of attraction in solid sodium chloride but becomes weaker when melted C The kinetic energy in solid sodium chloride is low in solid state but higher when melted D The arrangement of particles in solid sodium chloride are closely packed in orderly manner but become inorderly manner when melted T4 Chapter 5.7 Properties of Ionic Compounds and Covalent Compounds T5 Chapter 1.4 Electrolytic Cell
22 Diagram 5 shows the apparatus set-up of an electrolytic cell. Table 1 shows the standard electrode potential values for some half-cells. What is the product formed at electrode X? star A Copper B Hydrogen gas C Oxygen gas D Nitrogen gas T5 Chapter 1.4 Electrolytic Cell
23 The following ionic equation represents the reaction between sodium thiosulphate solution and sulphuric acid. > 2H^+ + S_2O_3^{2-} \rightarrow S + SO_2 + H_2O Which of the following statements explains the effect of the increasing of the concentration of sodium thiosulphate solution on the rate of reaction? star A Kinetic energy of thiosulphate ions increases B Concentration of thiosulphate ions per unit volume increases C The time of collision between hydrogen ions and thiosulphate ions increases D Activation energy of colliding hydrogen ions and thiosulphate ions increases T4 Chapter 7.4 Collision Theory
24 Composite materials are made up of matrix and strengthening substances. Composite material X is used in the construction of bridges and dams. Which of the following are the properties of the matrix substance of X? star A High compression strength and resistant to corrosion B High stretching strength and flexible C Low stretching strength and flexible D Low compression strength and resistant to corrosion T4 Chapter 8.4 Composite Materials and Its Importance
25 The following ionic equation represents a chemical reaction. > X + Y^2+ -> X^2+ + Y Which of the following are correct about the substances? star A Oxidised substance: Y^2+, Reduced substance: X, Oxidising agent: X, Reducing agent: Y^2+ B Oxidised substance: X, Reduced substance: Y^2+, Oxidising agent: X, Reducing agent: Y^2+ C Oxidised substance: X^2+, Reduced substance: Y, Oxidising agent: Y, Reducing agent: X^2+ D Oxidised substance: X, Reduced substance: Y^2+, Oxidising agent: Y^2+, Reducing agent: X T5 Chapter 1.1 Oxidation and Reduction
26 Which of the following practices does not support green technology concept to minimise the negative impact to environment? star A Usage of nuclear energy as alternative sources B Usage of food container made from coconut husk C Usage of domestic waste as water fertiliser D Usage of natural gas vehicle T5 Chapter 5.6 Application of Green Technology in Industrial Waste Management
27 Diagram 6 shows the structural formulae of two compounds. Which of the following properties are similar for P and Q? I Does not dissolve in water II Exist as gas at room temperature III Decolourise acidified potassium manganate(VII) solution IV Undergo combustion reaction with oxygen star A I and II B I and IV C II and III D III and IV T5 Chapter 2.3 Chemical Properties and Interconversion of Compounds Between Homologous Series
28 Table 1 shows the heat of neutralisation of two chemical reactions. | Reaction | Reactants | Heat of neutralisation (kJ mol⁻¹) | | :-------------------- | :-------------------------- | :------------------------------------------ | | I | HCl + NaOH | -57.3 | | II | CH₃COOH + NaOH | -55.0 | Which of the following statements is the best to explain why the value of heat of neutralisation for reactions I and II are different? star A All heat energy is released in reaction I while some of the heat energy released is reabsorbed in reaction II B HCl is completely ionise in water but CH₃COOH is partially ionise in water C The concentration of hydrogen ion in HCl is higher than CH₃COOH D HCl is strong acid but CH₃COOH is weak acid T4 Chapter 6.3 Strength of Acids and Alkalis T5 Chapter 3.2 Heat of Reaction
29 Diagram 7 shows a structural formula of polymer X. Which of the following is correct about the polymerisation reaction of polymer X? star A The polymerisation involves monomers from two different homologous series B The polymerisation reaction produces polymer X and another by-product C The polymerisation reaction occurs at the functional groups of the monomers involved D The polymerisation occurs towards monomer which has single covalent bond in its molecule T5 Chapter 4.1 Polymer
30 Diagram 8 shows a screenshot chat messages between two collegues in a cosmetic company. Which of the following substances need to be added to the lip moisturiser to overcome the problem? star A Formaldehyde to obtain homogeneous mixture of the ingredients B Stearic acid to prevent it from spoilage C Sodium lactate to retain its moisture D Glycerin to thicken its structure T5 Chapter 5.4 Medicines and Cosmetics
31 The following are information about particle X. - X^2- ion has electron arrangement of 2.8.8 - The number of neutrons of atom X is 16 What is the nucleon number of atom of element X? star A 30 B 32 C 34 D 36 T4 Chapter 2.3 Atomic Structure
32 Reaction between 5.4 g element Q with x g chlorine produces a compound with the empirical formula QCl_3. What is the value of x? [Relative atomic mass : Cl = 35.5, Q = 27] star A 7.1 B 10.7 C 14.2 D 21.3 T4 Chapter 3.2 Mole Concept T4 Chapter 3.3 Chemical Formula
33 What is the oxidation number of chlorine in sodium chlorate, NaClO_3? star A 0 B -1 C +5 D +7 T5 Chapter 1.1 Oxidation and Reduction
34 An experiment was conducted to investigate a reaction between iron wool with greenish yellow gas Y from Group 17 in The Periodic Table of Elements. It is found that iron wool burns brightly and produces 1.625 g of brown compound. What is the volume of gas Y used during the reaction? [Relative atomic mass: Fe = 56, Y = 35.5; Molar volume at room conditions = 24 dm³mol-¹] star A 240 cm³ B 310 cm³ C 360 cm³ D 470 cm³ T4 Chapter 3.2 Mole Concept T4 Chapter 3.4 Chemical Equation
35 Glucose, C6H12O6 is used in fermentation process to produce ethanol and gas P which turns limewater cloudy. x g of glucose is used in the fermentation process and releasing 8.4 dm³ of gas P. What is x? [Relative atomic mass: H = 1, C = 12, O = 16, Molar volume of gas = 24 dm³ mol-¹ at room conditions] star A 15.40 g B 31.50 g C 63.00 g D 126.00 g T4 Chapter 3.2 Mole Concept
36 Diagram 9 shows the set-up of apparatus used in an experiment to determine the end point of acid and alkali titration. It was found that 50.0 cm³ of sulphuric acid is needed to change the colour of phenolphthalein at the end point. What is the concentration of the sulphuric acid used? star A 0.025 moldm⁻³ B 0.050 moldm⁻³ C 0.100 moldm⁻³ D 0.200 moldm⁻³ T4 Chapter 6.7 Neutralisation
37 A group of students went for camping by the beach. They want to boil 5 dm³ of water using wood collected near their tent. If the fuel value of wood is 20 kJ g⁻¹, what is the mass of wood needed to be burned? [Specific heat capacity of air = 4.2 J g⁻¹ °C⁻¹; Density of water = 1 g cm⁻³; Room temperature of water = 27°C] star A 2.84 g B 7.67 g C 28.35 g D 76.65 g T5 Chapter 3.3 Application of Exothermic and Endothermic Reactions in Daily Life
38 A rubber tapper wants to send latex to a rubber factory. However he found that the latex had coagulated after a few hours of tapping the rubber tree. What should he do to solve his problem? star A Dilute the latex by adding some water B Add ammonia solution into the latex C Put table salt into the latex D Pour vinegar into the latex T5 Chapter 4.2 Natural Rubber
39 A group of students carried out an experiment to investigate factors that affect the rate of reaction. Excess calcium carbonate chips were put into a conical flask containing 25 cm^3 of 0.5 mol dm^-3 nitric acid solution. Diagram 10 shows a graph of the volume of gas released against time plotted after the reaction is complete. Which of the following volume and concentration of nitric acid should be used if the student wants to obtain twice the volume of the gas in a longer time? star A Volume: 100.0 cm^3, Concentration: 0.25 moldm^-3 B Volume: 50.0 cm^3, Concentration: 0.10 moldm^-3 C Volume: 50.0 cm^3, Concentration: 0.50 moldm^-3 D Volume: 25.0 cm^3, Concentration: 1.00 moldm^-3 T4 Chapter 7.2 Factors Affecting Rate of Reactions
40 Diagram 11 shows a flowchart for the cation test and the apparatus setup for a gas test found in salt X. Method W is used for the reaction between salt X with lead(II) nitrate solution to produce coloured solid Y. What is W and observation when Y is put in the water and heated? star A Method W: Precipitation, Observation: Yellow solid dissolves in hot water and reappear when cold B Method W: Precipitation, Observation: White solid dissolves in hot water and reappear when cold C Method W: Titration, Observation: White solid dissolves in hot water and reappear when cold D Method W: Titration, Observation: Yellow solid dissolves in hot water and reappear when cold T4 Chapter 6.9 Preparation of Salts T4 Chapter 6.11 Qualitative Analysis