Copy of VS 2024 Sec 4 Chem Prelim Paper 3

Class Register Number Name 6092/03 CHEMISTRY 24/Prelim/6092/3 PAPER 3 WEDNESDAY 14 August 2024 1 hour 50 minutes VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA VICTORIA SCHOOL PRELIMINARY EXAMINATION SECONDARY FOUR READ THESE INSTRUCTIONS FIRST Write your name, class and index number on all the work you hand in. Give details of the practical shift and laboratory where appropriate, in the boxes provided. Write in dark blue or black pen. You may use a HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Answer all questions in the spaces provided on the Question Paper. The use of an approved scientific calculator is expected, where appropriate. You may lose marks if you do not show your working or if you do not use appropriate units. Qualitative analysis notes are printed on page 12. 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. This question paper consists of 12 printed pages, including the cover page. [Turn Over For examiners’ use Question 1 / 19 Question 2 / 17 Question 3 / 4 Total / 40 Shift Laboratory

2 © Victoria School 24/4P/6092/3 [Turn Over 1 The reaction of aqueous solutions of strong acids and alkalis is exothermic. You are going to investigate the temperature rise when volumes of aqueous alkali and acid are mixed together. Read all the instructions carefully before starting the experiments in Question 1. Instructions You are going to carry out seven experiments. P is dilute sulfuric acid. Q is 1.23 mol/dm3 aqueous sodium hydroxide. (a) Experiment 1 Place a Styrofoam cup into a 250 cm 3 glass beaker. Put P into a burette and measure 40.00 cm3 of P into the Styrofoam cup. Measure the temperature of P and record the value in the table. Use a measuring cylinder to measure 10 cm3 of Q. Pour this volume of Q into the Styrofoam cup containing P . Stir, using the thermometer, and measure the highest temperature reached. Record this temperature in the table. Empty the Styrofoam cup and rinse it with water. Experiments 2 to 7 Repeat Experiment 1 but use the different volumes of P and Q for each experiment given in the table.

3 © Victoria School 24/4P/6092/3 [Turn Over Compl