Copy of MGS Chemistry P1

Page 2 of 16 Methodist Girls’ School Chemistry Paper 1 Sec 4 Preliminary Examination 2024 1 The diagram shows the setup for a chemical reaction which produces a gas. The gas is then dried and collected. What could the gas be? A carbon dioxide B hydrogen C oxygen D sulfur dioxide 2 The melting and boiling points of the gases in a sample of air are shown. gas melting point / °C boiling point / °C oxygen -219 -183 argon -189 -186 nitrogen -210 -196 At which temperature will the sample of air contain oxygen as the only liquid? A -174°C B -187°C C -215°C D -222°C 3 Which of the following pairs of substances can be separated by heating? A ammonium chloride and iodine B ammonium chloride and potassium iodide C copper (II) nitrate and potassium iodide D copper (II) nitrate and sodium chloride calcium oxide gas collected

Page 3 of 16 Methodist Girls’ School Chemistry Paper 1 Sec 4 Preliminary Examination 2024 4 The following diagrams can be used to illustrate the following. 1 a mixture of elements and compounds 2 a mixture of elements 3 molecules of an element 4 molecules of a compound W X Y Z What is the correct order of the diagrams? 1 2 3 4 A Y Z X W B Z Y X W C Z Y W X D Z X W Y 5 A student wrote the following statements in her test script: statement 1: “Hydrogen chloride has a lower boiling point than calcium chloride as covalent bonds are weaker than electrostatic forces of attraction.” statement 2: “In a gaseous sample of methane, the intermolecular forces of attraction between the CH4 molecules are weak.” statement 3: “In silicon dioxide, all valence electrons of silicon are used in the making of covalent bonds.” Which of the above statements are correct? A statement 1 and statement 2 B statement 1 and statement 3 C statement 2 and statement 3 D statement 1, 2 and 3

Page 4 of 16 Methodist Girls’ School Chemistry Paper 1 Sec 4 Preliminary Examination 2024 6 The table shows the proton number and nucleon number of elements M and N. element proton number nucleon number M 13 27 N 8 16 When M and N react to form a compound, what will be the mass of one mole of the compound? A 43 B 70 C 102 D 113 7 The relative masses and relative charges of particles V to Z are shown in Fig.1 and Fig. 2 respectively. Which of the following statements are correct? 1 W represents an electron. 2 X represents a hydrogen ion. 3 Z represents the nucleus of a helium atom. 4 V and Y represent the nuclei of isotopes. A 1 and 2 only B 2 and 3 only C 1, 2 and 4 only D 2, 3 and 4 only 8 Which statement best explains why brass, made of copper and zinc, is suitable to make mus