Springfield-Secondary-Sec-3-Science-Chemistry-EOY-2021

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