1 Which of the following substances exists as atoms? star A Magnesium B Nitrogen gas C Naphtalene D Lead (II)bromide T4 Chapter 3.3 Chemical Formula
2 Geiger miller is an apparatus which used to detect an isotope. The isotope is added into the fertilizer to study the metabolism rate of plant. What is the isotope? star A Carbon-14 B Uranium-235 C Phosphorus-32 D Sodium-24 T4 Chapter 2.4 Isotopes and Its Uses
3 Which chemical formulae are correct star A KCO3 B AgCl2 C BaSO4 D CaOH T4 Chapter 3.3 Chemical Formula
4 Why the size of element in Group 1 increase when going down the group in Periodic Table of Elements. star A Number of electrons increases B Relative atomic mass increase C Number of valence electrons increases D Number of shells filled with valence electrons increases. T4 Chapter 4.4 Elements in Group 1
5 Which of the following element can form oxide of acid when react with oxygen? star A Sodium B Aluminium C Carbon D Chlorine T4 Chapter 4.6 Elements in Period 3
6 Which of the following substance has highest pH value? star A Sodium hydroxide B Sodium chloride C Hydrochloric acid D Ammonium hydroxide T4 Chapter 6.2 pH Value T4 Chapter 6.3 Strength of Acids and Alkalis
7 Which of the following salts could be produced through neutralisation reaction? star A Magnesium carbonate B Sodium sulphate C Lead (II) chloride D Zinc nitrate T4 Chapter 6.7 Neutralisation
8 Which of the following substances consist of covalent bond? star A Barium sulphate B Nitrogen gas C Potassium oxide D Magnesium chloride T4 Chapter 5.3 Covalent Bond
9 Which of the following are the properties of ceramics? - Hard and strong - Malleable - Chemically inert - Good electrical conductor star A I and II B I and III C II and IV D III and IV T4 Chapter 8.3 Composition of Ceramics and Its Uses
10 The information about substance X are as follow. - Made up of silica glass fibre and plastic - Transmit information and data in the form of light - Connects computers in Local Area Network(LAN) What is substance X? star A Optical fibre B Fibre glass C Silicon carbide D Superconductor T4 Chapter 8.4 Composite Materials and Its Importance
11 Which of the following underlined substances acts as a reducing agent? star A 4Al + 3O_2 \rightarrow 2Al_2O_3 B Cu + N_2O \rightarrow CuO + N_2 C Zn + 2HCl \rightarrow ZnCl_2 + H_2 D 3CuO + 2NH_3 \rightarrow 3Cu + N_2 + 3H_2O T5 Chapter 1.1 Oxidation and Reduction
12 Iron is extracted from haematite in the blast furnace. Which gas is produced as a waste product? star A Hydrogen B Nitrogen C Carbon dioxide D Sulphur dioxide T5 Chapter 1.5 Extraction of Metal from Its Ore
13 Which of the following is the monomer of natural rubber? star A Disulphur dichloride B 1,6-diaminehexane C 2-methylbut-1,3-diene D Decanedioyl dichloride T5 Chapter 4.2 Natural Rubber
14 Diagram 1 shows the ingredient in strawberry jam. Which of the following functions to thicken the jam? star A Sugar B Pectin C Azo compounds D Ascorbic acid T5 Chapter 5.3 Food Additives
15 Table 1 shows some of the steps in wastewater treatment process. | P | Electrocoagulation process | |---|---| | Q | Discharge of effluent to the water waste | | R | Wastewater is pumped in | | S | Collection of sludge | Which of the following is the correct sequence of the process? star A P, Q, R, S B Q, P, S, R C R, P, S, Q D S, R, Q, P T5 Chapter 5.6 Application of Green Technology in Industrial Waste Management
16 Diagram 2 shows the apparatus set-up to determine the empirical formula of magnesium oxide. Which of the following metal can replace magnesium? star A Sodium B Zinc C Lead D Tin T4 Chapter 3.3 Chemical Formula
17 The statements below show the properties of X. - Used in Haber process - Able to conduct heat and electricity - Forms green and brown coloured ions Which of the following is the location of X in the Periodic Table of Elements? star A A B B C C D D T4 Chapter 4.7 Transition Elements
18 Which of the following is the pH of the solution formed? star A 1 B 5 C 7 D 13 T4 Chapter 6.2 pH Value
19 Table 2 shows the proton numbers of four elements P, Q, R and S. | Element | Proton number | |---|---| | P | 8 | | Q | 11 | | R | 16 | | S | 17 | Which of the following pairs of elements can combine to form an ionic compound? star A P and Q B P and R C Q and S D R and S T4 Chapter 5.1 Basics of Compound Formation
20 Diagram 4 shows the structure of ammonia molecule. What is the maximum number of hydrogen bonds that can be formed by water molecule? star A 1 B 2 C 3 D 4 T4 Chapter 5.4 Hydrogen Bond
21 Which of the following is a property of potassium fluoride? star A Volatile B Insoluble in water C Has a low melting point D Conducts electricity in molten state T4 Chapter 5.7 Properties of Ionic Compounds and Covalent Compounds
22 Table 3 shows the degree of dissociation of four solutions of alkalis which have the same concentration. | Solution | Degree of dissociation | |---|---| | W | High | | X | Medium | | Y | Very high | | Z | Low | Which solution has the highest pH value? star A W B X C Y D Z T4 Chapter 6.3 Strength of Acids and Alkalis
23 Table 4 shows part of steps to prepare standard solution of sodium carbonate in laboratory | P | Stir the mixture with a glass rod until all the solid sodium carbonate is completely dissolved in distilled water | |---|---| | Q | Add distilled water until it approaches the calibration mark on the volumetric flask. | | R | Add distilled water to the solid sodium carbonate in a beaker | | S | Rinse the beaker with distilled water. | | T | Transfer the sodium carbonate solution into volumetric flask. | Choose the correct arrangement of steps to prepare the standard solution of sodium carbonate. star A P,S,T,Q,R B R,P,S,T,Q C P,S,R,T,Q D R,P,T,S,Q T4 Chapter 6.6 Standard Solution
24 Diagram 5 shows the apparatus set-up to prepare a salt. Which of the following is correct? | | Substance P | Substance Q | Salt R | |:--|:--------------------|:--------------------|:--------------------| | A | Magnesium nitrate | Calsium sulphate | Magnesium sulphate | | B | Barium nitrate | Natrium sulphate | Barium sulphate | | C | Potassium sulphate | Silver nitrate | Potassium nitrate | | D | Sulphuric acid | Sodium hydroxide solution | Sodium sulphate | star A A B B C C D D T4 Chapter 6.9 Preparation of Salts
25 A chef wants to win in a cooking competition by preparing durian puff in the shortest time. In order to win, he had to make changes in the preparation of the food. Choose the correct changes to solve the problem. star A Add on water outside of the durian puff while cooking B Add more durian filling C Reduce the size of durian puff D Higher temperature of oven(180°C - 350°C) T4 Chapter 7.3 Application of Factors that Affect the Rate of Reaction in Daily Life
26 In order to produce a glass that is more resistant to heat and chemical, substance X is added to soda lime glass in the manufacturing process. What is X? star A Boron oxide B Lead (II) oxide C Sodium carbonate D Calcium carbonate T4 Chapter 8.2 Composition of Glass and Its Uses
27 Table 5 show standard electrode potential of metal ion P, Q, R and S. P, Q, R and S are not the actual symbol of the element. | Metal ion/ Metal | E°(V) | |:--|:--| | P^+ / P | + 0.80 | | Q^2+ / Q | -0.76 | | R^2+ / R | -0.14 | | S^2+ / S | -0.25 | Based on the above information, which is the correct arrangement of the strength of oxidation agent in ascending order. star A P,Q,R,S B Q,S,R,P C R^2+,S^2+,Q^2+,P^+ D Q^2+, S^2+,R^2+,P^+ T5 Chapter 1.2 Standard Electrode Potential
28 Which structural formula does not correspond to the named compound? | | Compound name | Structural formula | |---|---|---| | A | Ethanoic acid | | | B | Ethanol | | | C | Ethene | | | D | Ethane | | star A A B B C C D D T5 Chapter 2.4 Isomers and Naming Based on IUPAC Nomenclature
29 Which of the following food additive is added to thicken jam? star A Pectin B Aspartame C Sodium nitrite D Monoglyceride T5 Chapter 5.3 Food Additives
30 Which of the following is the side effect of mercury in the skin treatment product? star A Damage to the kidneys B Cause skin allergy C Clogging of skin pores D Skin become dry T5 Chapter 5.4 Medicines and Cosmetics
31 The following equation represents the reduction of iron(III) oxide by magnesium 3Mg + Fe_2O_3 -> 3MgO + 2Fe What is the mass of magnesium needed to reduce 16.0g of iron(III) oxide? [Relative atomic mass : Fe=56, Mg=24, O=16] star A 2.4g B 5.6g C 7.2g D 16.0g T4 Chapter 3.2 Mole Concept T4 Chapter 3.4 Chemical Equation
32 The following equation represents the decomposition reaction of zinc nitrate. 2Zn(NO_3)_2 -> 2 ZnO + 4 NO_2 + O_2 What is the maximum volume of nitrogen dioxide gas released at standard temperature and pressure (STP) when 18.9g of zinc nitrate was heated? [Relative formula mass : Zn(NO_3)_2 = 189gmol^-1 : Molar volume of gas at STP = 22.4dm^3mol^-1 ] star A 1.12 dm^3 B 2.24 dm^3 C 3.36 dm^3 D 4.48 dm^3 T4 Chapter 3.2 Mole Concept T4 Chapter 3.4 Chemical Equation
33 Diagram 6 shows the reaction between egg shells and ethanoic acid No changes are observed. What should be done in order to turn the lime water cloudy? star A Shake vigorously the mixture B Add water to the mixture C Use powdered egg shells D Heat the mixture T4 Chapter 7.2 Factors Affecting Rate of Reactions
34 The following equation represents the reaction between 50 cm^3 of 1.0 moldm^-3 sulphuric acid with calcium carbonate chips. CaCO_3 + H_2SO_4 -> CaSO_4 + CO_2 + H_2O What is the number of carbon dioxide molecules released? [Avogadro constant: 6.02 x 10^23 mol^-1] star A 1.51 x 10^22 B 3.01 x 10^22 C 6.02 x 10^22 D 9.03 x 10^22 T4 Chapter 3.2 Mole Concept T4 Chapter 3.4 Chemical Equation
35 Diagram 7 shows a graph of the volume of gas released against time for the reaction between sulphuric acid with excess marble chips. What is the average rate of the reaction, if sulphuric acid is replaced by the hidrocloric acid with same concentration? star A 0.5 cm^3 s^-1 B 0.7 cm^3 s^-1 C 1.5 cm^3 s^-1 D 3.0 cm^3 s^-1 T4 Chapter 7.1 Determining Rate of Reaction
36 Diagram 8 shows the apparatus set-up for the electrolysis of solid Q. What should be done to deflect the needle of the galvanometer? star A Heat Q B Pour ethanol into Q C Increase the number of dry cells D Replace carbon electrodes with copper electrodes T5 Chapter 1.4 Electrolytic Cell
37 Diagram 9 shows the structural formula for a carbon compound. H H H H | | | | H-C-C-C-C-H | | | | H H H H Which of the following is the isomer for the above carbon compound? star A 1-methylpropane B 2-methylpropane C 1-methylbutane D 2-methylbutane T5 Chapter 2.4 Isomers and Naming Based on IUPAC Nomenclature
38 When 50 cm^3 of 2.0 mol dm^-3 lead(II) nitrate was added to 50cm^3 of 1.5 mol dm^-3 sodium sulphate, the temperature increased by 9.0 °C. What is the value of heat of precipitation? [Specific heat capacity of solution = 4.2 Jg^-1°C ; Density of solution = 1.0 gcm^-3] star A -37.8 kJ mol^-1 B +37.8 kJ mol^-1 C -50.4 kJ mol^-1 D +50.4 kJ mol^-1 T5 Chapter 3.2 Heat of Reaction
39 The crop production at a farm is decreasing due to soil problem. The soil sample are dissolved in distilled water and a few tests are carried out on the solution. It is found that the soil is polluted by diprotic acid X. The acid is titrated with 25 cm^3 of 0.001 mol dm^-3 of sodium hydroxide solution that is added with three drops of phenolphthalein. Table 6 shows the results of the test carried out. | Volume of acid X (cm^3) | 25.00 | 25.50 | 25.70 | 25.80 | 25.90 | |---|---|---|---|---|---| | Colour of phenolphthalein in solution mixture | Pink | Pink | Pink | Colourless | Colourless | What is the pH value of acid X? star A 2.6 B 2.9 C 3.0 D 3.3 T4 Chapter 6.2 pH Value T4 Chapter 6.7 Neutralisation
40 Diagram 10 shows the apparatus set-up for the electroplating of iron key using 1.0 mol dm⁻³ copper (II) sulphate solution and copper metal as electrode. After 30 minutes, explain the observation in this experiment. star A The electroplating of iron key by copper metals does not occur because copper electrodes are less electropositive than iron key. B The electroplating of iron key does not occur because copper electrode needs to be connected to the positive terminals of dry cells. C The electroplating of iron key does not occur because the concentration of copper (II) sulphate is too low. D The electroplating of iron key does not occur due to insufficient number of dry cells. T5 Chapter 1.4 Electrolytic Cell