NYGH 2022-S3EOY-IP Chem P1

Class Register Number Name End-of-Year Examination 2022 Secondary 3 IP CHEMISTRY Paper 1 Multiple Choice 45 minutes Wednesday 5 October 0845 – 0930 Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue, correction fluid or tape. Write your name, register number and class in the spaces at the top of this page and on the Answer Sheet in the spaces provided. There are thirty 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 11. The use of approved scientific calculators is expected, where appropriate. This document consists of 11 printed pages and 1 blank page. Setter(s): OWJ/CHG NANYANG GIRLS' HIGH SCHOOL [Turn over

2 Setters: OWJ/CHG Chemistry Paper 1 1 The diagrams below show how particles in a substance are arranged in three different states. Which statement is correct? A State 1 can be changed to state 2 by melting. B State 3 can be changed to state 2 by sublimation. C Particles in state 2 are sliding over each other. D Substance in state 3 can be compressed. 2 A solid sample of ammonium carbonate was heated in a test tube to form ammonia , carbon dioxide and water vapour. (NH4)2CO3  2NH3 + CO2 + H2O A moist blue litmus paper was placed at the mouth of the test tube. What colour changes will the piece of moist blue litmus paper undergo? A Moist blue litmus paper remains blue. B Moist blue litmus paper turns red. C Moist blue litmus paper turns red and is then bleached. D Moist blue litmus paper turns red and then turns blue. 3 Which row correctly shows the effect of impurities on melting and boiling points? effect on melting point effect on boiling point A decrease decrease B decrease increase C increase decrease D increase increase state 1 state 2 state 3

3 Setters: OWJ/CHG Chemistry Paper 1 [Turn Over 4 Hydrochloric acid was reacted with calcium carbonate to produce a gas that was passed through a drying agent before being collected. Which row shows an appropriate drying agent to use and an appropriate method of collection? drying agent collection method A concentrated sulfuric acid downward delivery B concentrated sulfuric acid upward delivery C calcium oxide downward delivery D calcium oxide upward delivery 5 Ammonium chloride, copper(II) chloride, and silver chloride are mixed together in a mixture. Which techniques should be used in the given order to obtain hydrated copper(II) chloride from the mixture? 1 2 3 4 A dissolution filtration sublimation crystallisation B dissolution filtration sublimation evaporation to dryness C sublimation dissolution filtration crystallisation D sublimation dissolution filtration evaporation to dryness 6 Which statements are correct? 1 All elements exist as atoms. 2 All molecules are compounds. 3 All substances with ionic bonding are compounds. A 1 only B 3 only C 1 and 2 only D 2 and 3 only 7 Particle X can be represented as Au79 197 . Particle Y has 2 more protons, 1 more neutron, and 1 more electron than particle X. Which particle represents Y? A T𝑙81 198 B T𝑙81 200 C T𝑙+ 81 198 D T𝑙+ 81 200

4 Setters: OWJ/CHG Chemistry Paper 1 8 The following table shows the number of protons for elements P, Q, R and S. element number of protons P 1 Q 3 R 8 S 10 Which two elements will react to form a compound with a low melting point? A P and Q B P and R C Q and R D R and S 9 An element Z is found to exist in three isotopic forms, 20Z, 21Z and 22Z.  Relative abundance of 20Z is x  Relative abundance of 21Z is half the abundance of 20Z  Relative abundance of 22Z is x – 0.2 What is the relative atomic mass of Z? A 20.6 B 20.7 C 20.8 D 20.9 10 How many electrons are not involved in covalent bonding in a hydrazine, N2H4 molecule? A 0 B 4 C 8 D 12 11 Sulfuric acid is a vital commodity chemical due to its multiple applications. Which statement is not an application of sulfuric acid? A as a bleaching agent for paper, wool and silk B as an electrolyte in car batteries C manufacture of detergents D manufacture of fertilisers

5 Setters: OWJ/CHG Chemistry Paper 1 [Turn Over 12 Formic acid is a weak acid that is as a preservative and antibacterial agent in livestock feed. Which graph best represents the change in pH that occurs when a sample of formic acid is titrated with aqueous potassium hydroxide. 13 Most of the Earth's crust consists of solid oxides, the result of elements reacting with the oxygen in air or in water. The chemical formulae of some oxides are shown below. NO PbO CaO Al2O3 CO2 SO3 Which row in the table gives the correct number of each type of oxide? number of each type of oxide acidic basic neutral amphoteric A 1 1 2 2 B 2 1 1 2 C 2 2 1 1 D 3 1 2 1 pH volume of KOH(aq) volume of KOH(aq) volume of KOH(aq) pH pH pH A B C D volume of KOH(aq)

6 Setters: OWJ/CHG Chemistry Paper 1 14 In which reaction is the metal oxide or metal hydroxide not behaving as a base or an alkali? A 2KOH + (NH4)2SO4  K2SO4 + 2NH3 + H2O B Ca(OH)2 + 2NH4Cl  CaCl2 + 2NH3 + 2H2O C ZnO + 2HNO3  Zn(NO3)2 + H2O D MnO2 + 4HCl  MnCl2 + Cl2 + 2H2O 15 1 Which is the most suitable method to prepare a high yield of calcium sulfate salt? A Adding excess calcium carbonate to dilute sulfuric acid. B Adding excess calcium metal to dilute sulfuric acid. C Adding excess calcium hydroxide to dilute nitric acid, filter, followed by adding dilute sulfuric acid to filtrate. D Adding excess dilute sulfuric acid to calcium oxide. 16 The table below shows the pH of the solution and the colour of the solution after bromophenol blue has been added as an indicator. pH colour ≤ 3.0 yellow 3.0 to 4.6 greenish blue ≥ 4.6 blue Which statement is true? A The indicator would be suitable for an acid -base titration where the end point is around pH 9. B The indicator cannot be used to differentiate between water and sodium hydroxide solution. C In solution of pH 1, the indicator has a blue colour. D The indicator is not able to distinguish between a solution of hydrochloric acid which has a pH of 1 and a solution of ethanoic acid which has a pH of 5. 17 The reaction of iron( III) oxide with carbon monoxide in the blast furnace is represented by the following equation: Fe2O3(s) + 3CO(g)  2Fe(l) + 3CO2(g) When 5.00 kg of iron(III) oxide reacted with excess carbon monoxide, only 2.83 kg of iron was formed. What is the percentage yield of iron? A 56.6% B 61.8% C 76.1% D 80.9%

7 Setters: OWJ/CHG Chemistry Paper 1 [Turn Over 21 The compound SO2Cl2 reacts with water according to the following equation: SO2Cl2 + 2H2O  H2SO4 + 2HCl 0.35 g of SO2Cl2 was dissolved in distilled water to obtain a solution with a volume of 25.0 cm3. The solution was titrated with 0.267 mol dm−3 potassium hydroxide solution. What is the volume of potassium hydroxide solution used in the titration? A 9.70 cm3 B 19.40 cm3 C 29.10 cm3 D 38.80 cm3 18 Hydrogen peroxide decom