2022 PYSS Chem Prelims P1

[Turn over This exam paper is the property of Ping Yi Secondary School. It must not be duplicated in part or whole. This document consists of 18 printed pages including this cover page and inserts. ‘Perseverance Yields Success’ Ping Yi Secondary School PRELIMINARY EXAMINATION 2022 Secondary 4 Express Chemistry 6092/01 Paper 1 Multiple Choice 1 hour Additional materials: Multiple Choice Answer Sheet INSTRUCTIONS TO CANDIDATES Do not open this booklet until you are told to do so. Write your name, class and register number in the spaces at the top of this page. You may use a soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, glue or correction fluid. There are forty questions in 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 Optical Answer Sheet (OAS). 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 Data Sheet is printed on page 17. A copy of the Periodic Table is printed on page 18. Expected Grade □ A1 □ A2 □ B3 □ B4 □ C5 Teacher’s Comment Student’s Comment Parent’s Comment and Signature ���

2 [Turn Over This exam paper is the property of Ping Yi Secondary School. It must not be duplicated in part or whole. Answer all the questions in the answer sheet provided. 1 The diagram shows an experiment to find the formula of magnesium oxide. Which piece of apparatus would be needed in addition to those shown above? A burette B electronic balance C measuring cylinder D thermometer 2 Which of the following substances may be condensed using a water condenser? substance melting point / °C boiling point / °C A ammonia -78 -33 B butane -135 -0.5 C hydrogen chloride -115 -85 D pentane -130 36 3 Which of the following correctly describes the particles in a dilute sugar solution at room temperature? sugar molecules water molecules A close together, moving at random close together, moving at random B widely separated, not moving widely separated, moving at random C widely separated, moving at random close together, moving at random D widely separated, moving at random close together, not moving 4 At which temperature does a concentrated aqueous solution of sodium chloride begin to boil? A 93 ⁰C B 99 ⁰C C 100 ⁰C D 104 ⁰C ���

3 [Turn Over This exam paper is the property of Ping Yi Secondary School. It must not be duplicated in part or whole. 5 The diagram shows the apparatus used to obtain carbon monoxide. What is the main purpose of Y? A to dry the gas B to prevent water from being sucked back into the hot carbon C to remove carbon dioxide from the gas D to remove hydrogen