2021 Sec 3 Science Chemistry EOY Springfield Secondary with Answer

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BP-210 STUDENT NAME CLASS INDEX NUMBERS SGtENCE (GHEMISTRY/BTOLOGY) SECONDARY 3 EXPRESS Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 5078/01 October 2021 45 minutes READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or conection fluid. Write your name, registration number and class in the spaces at the top of this page and all the work you hand in. There are thifi questions in this section. Answer all questions. For each question, there are four possible answers, d B, C and D. Choose the one you consider conect and record your choice in soft pencil on the separate Answer Sheet. 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 8. The use of an approved scientific calculator is expected, where appropriate. Do not turn over this question paper until you are told to do so. This question paper consisG of lf printed pages PartnerlnLearning 209 [Turn Over SPRINGFIELD SECONDARY SCHOOL End-Of-Year Examination 2021

BP-211 2 I Which methods are used to test the purity of a substance? filtration measurement of melting point fractional distillation chromatography 1and2 B 1and3 C 2and4 D 3and4 The particles in substance T are in contact but still able to move freely' Substance T changes to a state in which the particles can only vibrate and rotate about their fixed positions. What is this change called? A condensation B evaporation C freezing D melting 3 Which mixture can the underlined substance be obtained by adding water' stirring and filtering? calcium carbonate and calcium chloride coooer([) sulfate and sodium chloride copoer(Il) carbonate and iron iron and magnesium PartnerlnLeaming 210 1 2 3 4 A 2 A B c D

BP-212 3 4 damp C/z and HC/ damp C/z and HC/ concentrated sulfuric acid Hydrogen chloride gas is very soluble in water, whereas chlorine is only slighUy soluble in water. Both gases can be dried using concentrated sulfuric acid. Which diagram represents the conect method of obtaining pure and dry chlorine gas from a sample of damp chlorine gas containing a small amount of hydrogen chloride? A damp C/z and HCi B c water water water damp Ciz and HC/ concentrated sulfuric acid concentrated sulfuric acid D concentrated sulfuric acid r 5 Which of the following is not a mixture? A bronze B crude oil C steel D silver PartnerlnLearning 211 flum Over

BP-213 4 6 7 Which pair of atoms have the same number of neutrons? A lSerana iSca e l8s ano llx c {ee ano lHe o 13si analrlnt Atom X gains three electrons when it forms an ion. Which is the electronic structure of X? A 2,7 B 2,5 c 2,8,1 D 2,8,3 8 An atom of chlodne has seven outer electrons. An atom of oxygen has six outer electrons. Which is the dot-and-cross diagram of the compound formed when orygen reacts with chlorine? AB PartnerlnLeaming 212 Dc xo I I

BP-214 5 9 Why does molten calcium chloride conduct electricigf A Electrons completely transfened from calcium atoms to chlorine atoms B Electrons in molten calcium chloride are free to move. C Calcium ions are strongly attracted to chloride ions. D The calcium ions and the chloride ions are free to move. Which statement describes a solution that contains hydroxide ions? A lt reacts with alkali to form salt and water. B lt produces an alkaline gas when heated with ammonium salt. C lt turns blue litmus red. D lt reacts with metals to produce carbon dioxide gas. The oxide of an element is added to hydrochloric acid and aqueous sodium hydroxide. It dissolves in both hydrochloric acid and aqueous sodium hydroxide. What is the likely formula of the oxide? A CaO B COz C Na2O D ZnO Which equation shows the method of preparation of a pure salt solution that requires the use of a pipette and burefte? A BaC/z(aq) + HzSO(aq) ---r BaSOa(s) + ZHCl(aq) B CuO(s) + ZHCl(aq) ---, CuC/z(aq) + HzO(/) C KOH(aq) + HC(aq) -* KC/(aq) + HzO(4 D MgCOe(s) + HzSOa(aq) -- MgSOr(aq) + HzO(/) + COz(9) 10 11 12 PartnerlnLearning 213 [Turn Over

BP-215 6 13 The diagram shows part of the Periodic Table' Which element has the highest proton number and which element has the largest number of valence electrons? highest proton number largest number of valence electrons A B c D Ca Ca Li Li 14 Chlorine is a GrouP Vll element' Which row describes the properties of chlorine? PartnerlnLeaming 214 Li CI Ca colour state at room temperature reaction with aqueous potass ium bromide A B c D reddish brown yellow yellow reddish brown liquid gas gas liquid bromine displaced no reaction bromine disPlaced no reaction tr I Ca cl Ca ct I

BP-216 7 15 Which statement about properties of some elements is correct? A Astatine is expected to be a liquid at room temperature. B The reactivity of alkali metals decreases down the group. C When halogens react with alkali metals, a covalent compound is formed. D Noble gases are unreactive because all of its electron shells are filled up. PartnerlnLeaming 21s flurn Over

BP-218 SPRINGFIELD SECONDARY SCHOOL End-Of-Year Examination 2021 STUDENT NAME CLASS INDEX NUMBERS scrENcE (cHEMTSTRY) SECONDARY 3 EXPRESS Paper 3 5076/03,5078/03 30 September 2021 t hour READ THESE INSTRUCTIONS FIRST Write your class, index number and name on all the work you hand in. Write in da* blue or black pen. You may use an HB pencil for any diagrams, graphs or rough working. Oo not use staples, paper clips, glue or conection fluid. The use of an approved scientmc calculator is expected, where appropriate. You may lose marks if you do not show your working or if you do no use appropriate units. Sec{lon A Answer all questions. Write your answers in the spaces provided on the question paper. Section B Answer any one question. Write your answers in the spaces provided on the question paper. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. For Examiner's Use Section A 140 Section B t10 /50 Do not turn over this question paper until you are toid to do so. This question paper consists of 14 printed pages, PartnerlnLearning ffurn Over Candidates answer on the question paper. No Additional Materials are required. A copy of the Periodic Table is printed on page 14. Total 217

BP-219 2 1 Section A Answer all the questions in the spaces provided. Name the pieces of apparatus most suitable to complete the following laboratory actions. (a) Separate oil from a mixture of oil and river water. t11 (b) Measure accurately 22.4 cm3 of solution into a beaker- t1l (c) Collect and measure the volume of a water-soluble gas' tl1 (d) Add exactly 25 cm3 of acid into a conical flask t1l When complete, Table 2.1 describes five processes and their names. Complete the table. Table 2.1 PartnerlnLearning 218 2 description of process name of process separating a precipitate from a solution fiftration cooling a vapour into a liquid mixing equal amounts of strong acid and strong alkali separating water from a salt solution heating a solid into a gas cooling a saturated solution to produce a pure salt t5l I