NYGH 2017-S3EOY-IP Chem P1

Class Register Number Name NANYANG GIRLS’ HIGH SCHOOL End-of-Year Examination 2017 Secondary Three Chemistry Paper 1 Multiple Choice 45 minutes Wednesday 4 October 2017 0845-0930 Additional materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. 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 thirty questions in 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 Multiple Choice Answer Sheet. INFORMATION FOR CANDIDATES 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. The use of approved scientific calculators is allowed. A copy of the Periodic Table is found on page 11. Setters: OWJ This document consists of 10 printed pages and 2 blank page. NANYANG GIRLS’ HIGH SCHOOL [Turn over]

2017 End-of-Year Examination Secondary Three 2 Nanyang Girls’ High School Setters: OWJ Chemistry [Turn Over] 1 Which of the following accurately describes the arrangement of particles in a dilute aqueous solution of ethanol? water particles ethanol particles A close together close together B close together far apart C far apart close together D far apart far apart 2 The diagram below shows an experimental set-up involving gases X and Y. After some time the water level at Z becomes lower. Which of the following could be the identities of X and Y? X Y A carbon monoxide oxygen B fluorine argon C nitrogen nitrogen monoxide D nitrogen dioxide carbon dioxide 3 Which of the following is a set of two mixtures? A air, carbon dioxide B bronze, hydrogen C D hydrogen chloride, seawater steel, sodium chloride solution 4 Which of the following is true for covalent and ionic substances? covalent ionic A compound only compound only B compound only element or compound C element or compound compound only D element or compound element or compound porous pot inverted beaker water initial water level Z Y X

2017 End-of-Year Examination Secondary Three 3 Nanyang Girls’ High School Setters: OWJ Chemistry [Turn Over] 5 Which of the following properties provide the basis for separation using fractional distillation? A boiling points B colours C densities D solubilities in the same solvent 6 The properties of three unknown substances A, B and C are shown below. substance solubility in water melting point/°C boiling point/°C A insoluble 5 93 B insoluble 82 438 C soluble –13 67 When substances A, B, C and water are mixed together at room temperature and pressure, which of the following sequence of steps should be conducted to obtain substances A, B and C from the mixture? A filter à separating funnel à evaporation to dryness B filter à separating funnel à fractional distillation C separating funnel à filter à evaporation to dryness D separating funnel à filter à fractional distillation 7 An ion of element X with the formula X3+, contains 18 electrons and has a nucleon number of 45. How many neutrons are present in an atom of X? A 18 B 24 C 27 D 30 8 Magnesium has a relative atomic mass of 24.3 and has three isotopes, 24Mg, 25Mg and 26Mg. The relative abundance of 26Mg is 10%. What is the relative abundance of 24Mg? A 70% B 75% C 80% D 85% 9 Which of the following apparatus is most suitable for measuring a volume of 22.80 cm3? A Beaker B Burette C Measuring cylinder D Pipette

2017 End-of-Year Examination Secondary Three 4 Nanyang Girls’ High School Setters: OWJ Chemistry [Turn Over] 10 Which of the following will produce the most number of moles of mobile ions when placed in water? A 17.5 g of barium sulfate B 25.7 g of barium hydroxide C 32.0 g of aluminium nitrate D 20.4 g of aluminium oxide 11 A gas occupies 6 dm3 at room temperature and pressure. Given that the mass of the gas is 8 g, what is the relative molecular mass of the gas? A 8.0 B 16.0 C 32.0 D 64.0 12 Which of the following substances has the highest percentage by mass of nitrogen? A NH4Cl B NH4NO3 C (NH4)2SO4 D (NH4)3PO4 13 A compound with a mass of 16 g contains only nitrogen and 2 g of hydrogen. Given that the relative molecular mass of the compound is 32.0, what is the molecular formula of the compound? A NH2 B NH3 C N2H4 D N3H8 14 11.7 g of sodium chloride is dissolved in 100 cm3 of water to form sodium chloride solution. 20 cm3 of this solution is reacted with excess lead(II) nitrate solution and 3.34 g of lead(II) chloride precipitate is formed. What is the percentage yield for the reaction? A 6 % B 12 % C 30 % D 60 % 15 10.0 g of an impure barium carbonate sample is heated to form a colourless, odourless gas that forms a white precipitate in limewater. The remaining solid weighs 8.1 g. What is the percentage purity of the barium carbonate sample? A 80 % B 85 % C 90 % D 95 %

2017 End-of-Year Examination Secondary Three 5 Nanyang Girls’ High School Setters: OWJ Chemistry [Turn Over] 16 Which of the following will not react with dilute hydrochloric acid? A silver B silver carbonate C silver hydroxide D silver oxide 17 Which of the following salts cannot be formed directly from copper(II) chloride? A copper(II) carbonate B copper(II) sulfate C lead(II) chloride D silver chloride 18 Which of the following metals will produce the greatest volume of gas when the same number of moles of the metals are reacted with excess sulfuric acid of the same concentration and volume? A barium B copper C magnesium D potassium 19 Which of the following ionic equations is incorrect? A 2MnO4– + 5H2O2 + 8H+ à 2Mn2+ + 5O2 + 4H2O B Cr2O72– + 6Fe2+ + 14H+ à 2Cr3+ + 6Fe3+ + 7H2O C H2O2 + 2I– + 2H+ à I2 + 2H2O D 2S2O32– + I2 à 2I– + S4O62– 20 Which of the following elements in Period 3 of the Periodic Table is likely to have the highest melting point? A sodium B magnesium C chlorine D argon

2017 End-of-Year Examination Secondary Three 6 Nanyang Girls’ High School Setters: OWJ Chemistry [Turn Over] 21 The diagram below shows four structures that can be formed by carbon. How many of the above structures can conduct electricity? A 1 B 2 C 3 D 4 22 For the structure shown below, which Groups in the Periodic Table are elements X, Y and Z in? X Y Z A 4 17 16 B 14 17 16 C 14 17 2 D 14 1 16 carbon atom carbon atom carbon atom carbon atom

2017 End-of-Year Examination Secondary Three 7 Nanyang Girls’ High School Setters: OWJ Chemistry [Turn Over] 23 The table below shows the properties of four substances. substance melting point /°C boiling point /°C electrical conductivity solubility in water as solid as liquid W 17 118 Poor Poor Soluble X 455 1547 Poor Good Insoluble Y 1064 2970 Good Good Insoluble Z 3550 4830 Poor Poor Insoluble Which of the following statements about the structure of the substances is true? A W has a simple covalent structure. B X has a giant covalent structure. C Y has a giant ionic structure. D Z has a giant metallic structure. 24 Curve 1 in the graph below shows the volume of gas produced when 2 dm3 of 0.5 mol dm–3 hydrogen peroxide is decomposed, with manganese(IV) oxide as a catalyst. Which of the following changes could have resulted in curve 2 being obtained instead of curve 1? A using 2 dm3 of 1.00 mol/dm3 hydrogen peroxide B using 3 dm3 of 0.75 mol/dm3 hydrogen peroxide C using 4 dm3 of 0.20 mol/dm3 hydrogen peroxide D using 5 dm3 of 0.30 mol/dm3 hydrogen peroxide Volu