BTYSS 2024 FYE 4E CHEM P1

BEATTY SECONDARY SCHOOL PRELIMINARY EXAMINATION 2024 SECONDARY FOUR EXPRESS CANDIDATE NAME CLASS REGISTER NUMBER CHEMISTRY 6092/01 Paper 1 Multiple Choice 28 August 2024 Setter: Mdm Stella Soh 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and register number on the Multiple Choice Answer Sheet provided. There are forty questions on this paper. Answer all questions. For each question there are four possible answers, A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. A copy of the Periodic Table is printed on page 18. The use of an approved scientific calculator is expected, where appropriate. This document consists of 18 printed pages and 0 blank page. [Turn over

2 1 A student follows the rate of the reaction between marble chips, CaCO 3, and dilute hydrochloric acid. CaCO3 + 2HCl → CaCl2 + CO2 + H2O Which set-ups show the apparatus that are required for this experiment? A 1 and 2 only B 1 and 3 only C 2 and 4 only D 1, 2 and 4 only 2 4 1 3

3 2 The apparatus shown in the diagram was used to compare the rate of diffusion between a gas and air. A beaker containing the gas was placed over the porous pot. Which gas would cause bubbles to be observed in the beaker of water? A carbon monoxide B hydrogen chloride C methane D sulfur dioxide 3 An unknown gas, Z can be separated from a mixture of gases, X, Y and Z using the set- up as shown below. In which mixture will Z be effectively separated from? X Y Z A carbon dioxide nitrogen oxygen B hydrogen carbon dioxide nitrogen C nitrogen oxygen hydrogen D oxygen hydrogen carbon monoxide X, Y, Z copper(II) oxide Z aqueous sodium hydroxide water

4 4 A chromatography experiment was done on a brand of food colouring to determine the number of coloured dyes present. Chromatogram A shows the separation of the coloured dyes using water as a solvent. It is then rotated clockwise 90  and placed in ethanol as a solvent as shown in the chromatogram B. How many different types of coloured dyes are present in the food colouring? A 3 B 6 C 9 D 12 5 The melting and boiling points of the substances are tabulated in the table. melting point / C boiling point / C P 50 80 Q 70 500 R 65 67 S −15 −12 T 0 99 At which temperature would two liquids exist? A −20 C B −15 C C 15 C D 85 C

5 6 A beam of protons was passed through an electrostatic field between two charged plates. The electrostatic field deflected the beam of protons towards the negatively charged plates. The lower the relative mass of the particle, the larger the deflection. The experiment was repeated using a beam of electrons in place of the beam of protons. Which row correctly shows the extent of deflection and the direction of the beam of electrons? amount of deflection of beam of electrons direction of deflection of beam of electrons A deflected less than beam of protons opposite direction to beam of protons B deflected less than beam of protons same direction as beam of protons C deflected more than beam of protons opposite direction to beam of protons D deflected more than beam of protons same direction as beam of protons 7 Which compound has both ionic and covalent bonds? A hydrogen chloride B magnesium nitrate C potassium fluoride D zinc chloride 8 Which statements correctly describe the sub-atomic particles present in a selenium atom, Se34 79 ? 1. It has the same number of electrons as a S16 32 2− ion. 2. It has the same number of neutrons as a Br35 80 atom. 3. It has twice the number of protons as a C𝑙17 35.5 − ion. A 1 and 2 B 1 and 3 C 2 and 3 D 1, 2 and 3 9 Which statement about diamond and graphite is correct? A Both diamond and graphite are conductors of electricity and can be used as an electrode. B Both diamond and graphite are macromolecules and allotropes of carbon. C Diamond is hard with high melting point but graphite is soft with low melting point. D Diamond is made up of covalent bonds whereas graphite is made up of ionic bonds.

6 10 The table below shows the properties of some substances. Which underlined substance has been classified as an element, compound or mixture incorrectly? property classification A A white solid is formed when a silvery metal is burnt in air. element B Black powder burns in air to form a colourless gas. element C Green powder on heating leaves a black residue and a colourless gas is evolved. compound D White solid melts over 56 C to 58C mixture 11 A sample of solid X is heated until it is completely melted. The graph shows how its temperature varies with time as molten X is cooled. Which statements are true about the particles in X as it cools? 1. They are closer to each other at stage RS than at stage PQ. 2. The forces of attraction are stronger at stage P than at stage S. 3. The arrangement is more orderly at stage RS than at stage PQ. 4. Their total energy content at stage QR is lower than stage RS. A 1 and 2 B 1 and 3 C 2 and 3 D 2 and 4 Temperature /C P Q R S time /min

7 12 A tablet of aspirin, C9H8O4, is crushed and dissolved in water. The acid present in a tablet of aspirin can be neutralized by 12.25 cm3 of 0.147 mol/dm3 sodium hydroxide. C9H8O4 + NaOH → C9H7O4Na + H2O Given that one grain of aspirin is 0.0648g, how many grains of aspirin are there in the tablet? [Mr: C9H8O4, 180] A 0.0018 B 0.324 C 5 D 15 13 Zinc reacts with dilute hydrochloric acid. Which solution would give the fastest initial rate of reaction? A 10 g of HCl in 50 cm3 of water B 25 g of HCl in 100 cm3 of water C 30 g of HCl in 500 cm3 of water D 45 g of HCl in 1000 cm3 of water 14 Methanethiol gas, CH3SH, burns as shown in the equation below. CH3SH (g) + 3O2 (g) → CO2 (g) + SO2 (g) + 2H2O (g) A sample of 20 cm3 of methanethiol gas was burned with 30 cm3 of oxygen gas. What would be the final volume of the resultant mixture of gases when cooled to room temperature and pressure? A 20 cm3 B 30 cm3 C 40 cm3 D 50 cm3 15 Which statements best describe what happens in the Haber process ? 1. The hydrogen needed is obtained from the fractional distillation of liquefied air. 2. The process is reversible. 3. The ratio of the molar volume of hydrogen to nitrogen is 3:1. 4. The unchanged reactants are reused. A 1 and 3 only B 1, 2, 3 and 4 C 2 and 3 only D 2, 3 and 4 only

8 16 Yanny titrated 25.00 cm3 of 0.100 mol/dm3 of sulfuric acid with 0.250 mol/dm3 of sodium hydroxide using a methyl orange indicator. H2SO4 (aq) + 2NaOH (aq) → Na2SO4 (aq) + 2H2O (l) She recorded the volume of sodium hydroxide used to be 24.00 cm3. Which statement(s) is/are correct? 1. The colour of the solution at the end of the titration is yellow. 2. The colour of the solution at the end of the titration is orange. 3. She has exceeded the end-point of the titration. 4. She has just reached the end-point of the titration A 1 and 3 only B 1 and 4 only C 2 and 3 only D 2 and 4 only 17 A student is given five reagents as shown below to make salts. dilute hydrochloric acid dilute nitric acid dilute sulfuric acid solid lead (II) oxide solid copper (II) oxide How many soluble salts can be prepared? A 3 B 4 C 5 D 6