BBSS Prelim P1

Name: …………………………………………… Index No. …………. Class: …………… CHEMISTRY 6092/01 Paper 1 Multiple Choice 20 AUGUST 2024 1105 - 1205 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write your name, index number and class in the spaces provided at the top of this page. Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. There are forty 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 22. The use of an approved scientific calculator is expected, where appropriate. Bukit Batok Secondary School GCE O-LEVEL PRELIMINARY EXAMINATIONS 2024 SECONDARY 4 EXPRESS This document consists of 22 printed pages.

BBSS/PRELIMS 2024/ Sec 4/Chemistry/ Paper 1 Applying past knowledge to new situations 2 1 A student transferred exactly 25.0 cm3 of dilute hydrochloric acid into a conical flask. He added 2.50 g of solid calcium carbonate and measured the change in temperature of the mixture. Which apparatus does the student need to carry out this experiment? A burette, pipette, thermometer B electronic balance, measuring cylinder, thermometer C electronic balance, pipette, stopwatch D electronic balance, pipette, thermometer 2 The rate of diffusion of ammonia and oxygen gases were compared at 20 C and 60 C. Which would have the slowest rate of diffusion? A Ammonia gas at 60 C B Ammonia gas at 20 C C Oxygen gas at 60 C D Oxygen gas at 20 C 3 The melting and boiling points of four different substances are as shown. substance melting point / oC boiling point / oC ethane  183  87 lead 328 1744 nitrogen  210  196 phosphorus 44 280 From the data given above, which of the following statements is correct? A Ethane is a volatile liquid at room temperature. B Lead has the greatest kinetic energy at 300 oC. C Nitrogen has the weakest forces of attraction between its particles at -190 oC. D Phosphorus is likely to be a gas at 276 oC if it contains some impurities.

BBSS/PRELIMS 2024/ Sec 4/Chemistry/ Paper 1 Applying past knowledge to new situations 3 4 Liquids Y and Z are immiscible.  Y has a lower boiling point than Z.  Y has a lower density than Z.  Y and Z can be separated from each other both by fractional distillation and using a separating funnel. Which row correctly gives the first liquid to be collected by fractional distillation and using separating funnel? first liquid collected by fractional distillation first liquid