2023 LVSS Chem Prelims P1

LOYANG VIEW SECONDARY SCHOOL Preliminary Examination 2023 Secondary Four Express CANDIDATE NAME : ……………………………………………………………….......... CLASS : …………………. INDEX NUMBER : ……………. CHEMISTRY 6092/01 Paper 1 Multiple Choice 11 Sep 2023 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and index number on the Answer Sheet in the spaces provided unless this has been done for you. 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 21. The use of an approved scientific calculator is expected, where appropriate. Setter: Mrs Rachel Koh This paper consists of 21 printed pages.

2 1 The diagram below shows an apparatus for studying the effect of heat on substance X. What is X? A silicon B carbon C iodine D sulfur 2 Four balloons were filled with different types of gases each and left overnight in a room. The balloons were found to have shrunk to different extents overnight. Which is the correct arrangement of the balloons in increasing order of size? balloon gas in the balloon P carbon dioxide Q helium R hydrogen S nitrogen A P, Q, R, S B Q, R, S, P C R, Q, P, S D R, Q, S, P solid X heat

3 3 The graph shows the change in the temperature of a substance with time when it is heated from −10°C to 60°C. Which statement describes the change taking place at the respective stages mentioned? A Energy is released from points P to Q. B Kinetic energy of the particles remains constant from points P to U. C Particles gain energy to overcome the forces of attraction from points S to T. D There is a large increase in the volume of the substance from points R to S. 4 The table below shows some information about four substances labelled P to S. substance appearance change on heating P colourless liquid boils away, leaving a white residue Q colourless gas burns in oxygen to form carbon dioxide and water only R yellow solid splits up by electricity to form a metal and a gas S white solid burns in air to form an oxide as the only product Which of these substances, P,Q,R and S are compounds? A P and Q only B Q and R only C R and S only D P,Q and R only temperature/ oC time

4 5 An excess of aqueous sodium hydroxide was added to a sample of ammonium sulfate crystals. The mixture was then