SNGS 2024 S4 Prelim Paper 1 QP

This document consists of 22 printed pages. [Turn over Name: _______________________________ ( ) Class:___________ PRELIMINARY EXAMINATION GENERAL CERTIFICATION OF EDUCATION ORDINARY LEVEL _____________________________________________________________________ CHEMISTRY 6092/01 Paper 1 Multiple Choice 28 August 2024 1 hour Additional materials: Multiple Choice Answer Sheet _____________________________________________________________________ READ THESE INSTRUCTIONS FIRST Write your name, register number and class on the Answer Sheet using a soft pencil. There are 40 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 the separate Answer Sheet. Amendments may be done using a soft eraser. 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. For Examiner’s Use Total (40)

2 T 1 An ion X2– has m nucleons and n electrons. What does the nucleus of an atom of X contain? number of protons number of neutrons A n – 2 m – n B n – 2 m – (n – 2) C n + 2 m – (n – 2) D n + 2 m – (n + 2) 2 Which of the following substances could be hydrogen chloride? melting point /°C boiling point /°C electrical conductivity in molten state in aqueous state A –100 –85 none good B –114 78 none none C 190 290 none insoluble D 1081 1565 good good 3 The table below shows some information about four substances labelled P to S. substance appearance observations P colourless liquid boils away, leaving a white residue Q colourless gas burns in oxygen to form water and carbon dioxide only R yellow solid splits up by electricity in molten state to form a metal and a gas S white solid burns in air to form an oxide as the only product Based on the observations, 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 Q, R and S only

3 4 The graph below shows the cooling curve of carbon disulfide. Which one of the following statements is true? A The boiling point of carbon disulfide is -112 °C. B From t1 to t2, the spaces between particles are increasing. C From t2 to t3, there is no solid present. D From t3 to t4, all the particles of carbon disulfide are vibrating in fixed positio