2022 Punggol Sec Chemistry P1

1 EXP PUNGGOL SECONDARY SCHOOL SECONDARY 4/5 EXPRESS 2022 PRELIMINARY EXAMINATION QUESTION BOOKLET NAME CLASS INDEX NUMBER Science (Physics/Chemistry) Paper 1 5076/01 30 August 2022 1 hour 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 OTAS in the spaces provided. There are forty questions in this section. 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 OTAS. Read the instructions on the OTAS 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 of the Periodic Table is printed on page 17. The use of an approved scientific calculator is expected, where appropriate. For Examiner’s use Parent’s Signature Physics - Chemistry - Total /40 This paper consists of 17 printed pages and 0 blank page.

2 Answer all questions. 21 What additional apparatus are needed to measure the rate of carbon dioxide produced when calcium carbonate is added to dilute hydrochloric acid in the set-up as shown? 1. stopwatch 2. measuring cylinder 3. gas syringe 4. gas jar A 1 and 2 B 2 and 4 C 1 and 3 D 2 and 3 22 A colourless solution of W is tested separately with aqueous sodium hydroxide and aqueous barium nitrate acidified with dilute nitric acid. The test results are shown. test aqueous sodium hydroxide aqueous barium nitrate acidified with dilute nitric acid results white ppt soluble in excess white precipitate Identify the colourless solution of W. A zinc chloride B zinc sulfate C calcium nitrate D calcium sulfate 23 Which diagram shows the arrangement of particles of a mixture of nitrogen and oxygen? dilute hydrochloric acid calcium carbonate

3 24 Water is a covalently bonded compound made from the elements oxygen and hydrogen. Which ‘dot and cross’ diagram shows the arrangement of the outer shell electrons in a molecule of water? A B C D 25 Which pair of elements form a compound by sharing of electrons? A carbon and hydrogen B potassium and chlorine C helium and nitrogen D sodium and iodine 26 Why does molten calcium chloride conduct electricity? A Electron is transferred from calcium to chlorine atoms. B The calcium and chloride ions are free to move. C The calcium and chloride electrons are free to move. D The calcium and chloride ions are attracted to each other strongly. 27 The electronic configuration of some elements are shown in the table. element Q R electronic configuration 2,8,8,1 2,7 What is the formula of the compound formed between Q and R? A Q2R2 B R2Q C QR2 D QR 28 An excess of magnesium is added to 200 cm3 of 1.0 mol/dm3 hydrochloric acid. Mg (s) + 2HCl (aq) → 2MgCl2 (aq) + H2 (g) What is the maximum volume of hydrogen gas produced at room temperature and pressure? A 0.2 dm3 B 1.2 dm3 C 2.4 dm3 D 4.8 dm3 HH Ox x HH Ox x HH O xx xx HH Ox x

4 29 25 cm3 of dilute nitric acid is neutralised by 30 cm3 of 0.5 mol/dm3 aqueous sodium hydroxide. HNO3 (aq) + NaOH (aq) → NaNO3 (aq) + H2O (l) What is the concentration of dilute nitric acid? A 0.015 mol/dm3 B 0.03 mol/dm3 C 0.417 mol/dm3 D 0.6 mol/dm3 30 Which statement about the elements in the Periodic Table is correct? A Elements are arranged in order of their nucleon number. B The reactivity of Group VII increases down the group. C Elements in the same Group have similar chemical properties. D Elements in the same Period have similar physical properties. 31 R and T are elements in Group VII of the Periodic Table. R has a melting point of ̶ 101°C. T has a melting point of 114 °C. Which statement is not correct? A R has less electron shells than T. B R has more protons than T. C R has more electrons than T. D R is less reactive than T. 32 The reactive series for some metals is shown. least reactive → most reactive Ag Cu Fe Zn Al Mg Which reaction will take place? A iron + aluminium oxide → aluminium + iron(II) oxide B aluminium + iron(II)oxide → aluminium oxide + iron C iron(II) sulfate + copper → iron + copper(II) sulfate D copper(II) nitrate + silver → copper + silver nitrate

5 33 Which substance represents a Group I metal? malleability melting point and boiling point conduction of electricity A malleable low good B malleable low poor C non- malleable high good D malleable high poor 34 Z is a natural indicator extracted from a vegetable. It forms a yellow colour in distilled water. It also forms a yellow colour in acidic solution but changes to red when excess aqueous sodium hydroxide is added to it. 2 ml of Z is added to a solution of limewater and vinegar respectively. What colours are observed? limewater vinegar A red red B red yellow C yellow red D yellow yellow 35 Carbon monoxide, oxides of nitrogen and sulfur dioxide are all common pollutants of the air. Which row describe the effect on the environment and source of the pollutant correctly? pollutant effect on the environment source A carbon monoxide acid rain combustion of fossil fuel B sulfur dioxide global warming lightning activities C oxides of nitrogen acid rain lightning activities D unburnt hydrocarbons acid rain volcanoes eruptions

6 36 Which row correctly describes the composition of clean and dry air? percentage of nitrogen /% percentage of oxygen /% percentage of carbon dioxide and noble gases / % Most abundant noble gas A 78 21 0.03 helium B 79 20 1 argon C 78 21 1 argon D 78 21 1 helium 37 Dissolving powdered sodium hydroxide in water is an exothermic process. Which row describes the changes correctly? temperature changes energy change A fall absorbed from surroundings B rise absorbed from surroundings C fall given out to surroundings D rise given out to surroundings 38 The alkanes are a homologous series of organic compounds. Which row describes the physical properties correctly as the number of carbon atoms increases in the series? viscosity flammability melting point A decreases decreases decreases B increases decreases increases C increases increases decreases D decreases increases increases

7 39 Chlorine gas reacts with methane under certain conditions. Which row describes the type of reaction and the conditions required? type of reaction conditions A substitution presence of ultraviolet light B addition complete darkness C addition presence of ultraviolet light D substitution complete darkness 40 The apparatus is used in the laboratory to produce ethene from paraffin oil. What type of reaction is taking place? A oxidation C combustion B addition D cracking water mineral wool soaked in paraffin oil catalyst heat ethene

8 The Periodic Table of Elements Group I II III IV V VI VII 0 Key proton (atomic) number atomic symbol name relative atomic mass 1 H hydrogen 1 2 He helium 4 3 Li lithium 7 4 Be beryllium 9 5 B boron 11 6 C carbon 12 7 N nitrogen 14 8 O oxygen 16 9 F fluorine 19