AES 4NA Science Chemistry P4 Question Paper 2023

[Turn over Name: ……………………………………………….. ( ) Class: ……... ASSUMPTION ENGLISH SCHOOL PRELIMINARY EXAMINATION 2023 SCIENCE (CHEMISTRY) 5105 / 04 5107 / 04 ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL LEVEL: Sec 4 Normal (Academic) DATE : 3 August 2023 CLASSES: Sec 4/4, 4/5 and 4/6 SBB DURATION: 1 hour 15 minutes (Papers 3 & 4) Additional Materials provided: NIL INSTRUCTIONS TO CANDIDATES Do not open this booklet until you are told to do so. Write your NAME, INDEX NUMBER and CLASS at the top of this page. Write in dark blue or black pen on both sides of the paper. You may use a soft pencil for any diagrams or graphs. Do not use staples, paper clips, highlighters, glue or correction fluid. Answer all questions in Section A and any two questions in Section B. In calculations, you should show all the steps in your working, giving your answer at each stage. You are advised to spend no longer than 30 minutes on Paper 3. You may proceed to answer Paper 4 as soon as you have completed Paper 3. A copy of the Periodic Table is printed on the last page of Paper 4. At the end of the examination, hand in your OAS paper and Question Papers separately. The number of marks is given in brackets [ ] at the end of each question or part question. For Examiner’s Use Paper 3 Section A Section B Total This question paper consists of 11 printed pages including this page. 14 50 20 16

2 5105/5107/04/4NA/PRELIM/23 Section A [14 marks] Answer all the questions in the spaces provided. 1 A mixture of two miscible substances, methanol and propanol, are to be separated. The boiling points of methanol and propanol are 64 C and 98 C respectively. The mixture is heated in the apparatus shown below. (a) State the use of pieces of solids added to the liquid mixture during the separation. …………………………………………………………………………………….. [1] (b) Which of the two substances will be collected in the beaker first? Explain your answer. …………………………………………………………………………………….. …………………………………………………………………………………….. [1] (c) Describe the arrangement and movement of particles at point X. arrangement……………………………………………………………………… …………………………………………………………………………………….. movement………………………………………………………………………… …………………………………………………………………………………….. [2] thermometer glass beads round bottomed flask liquid mixtur