C7-C10 Chem Mock Paper - MCQ

STUDENT NAME CLASS INDEX NUMBER MOCK PAPER C7 / C8 / C9 / C10 Additional materials: OTAS sheet / Periodic Table Duration: 20 minutes READ THESE INSTRUCTIONS FIRST Write your centre number, index number and name on all the work you hand in. You may use an HB pencil for any diagrams, graphs or rough working. Write in dark blue or black pen. Do not use staples, paper clips, glue or correction fluid. The use of an approved scientific calculator is expected, where appropriate. You may lose marks if you do not show your working or if you do not use appropriate units. DO NOT WRITE ON ANY BARCODES. FOR EXAMINERS’ USE This document consists of 5 printed pages and 1 blank page. © chiasamuel 2025

2 Section A: Multiple-Choice Question (15 marks) Shade your answer in the given OTAS sheet. 1 What is the volume of 3 mol of gas? A 24 dm³ B 48 dm³ C 72 dm³ D 96 dm³ 2 A sample of 2.0 g of sodium hydroxide is dissolved in 200 cm³ of water. What is the concentration of the solution? A 0.10 mol/dm³ B 0.25 mol/dm³ C 0.50 mol/dm³ D 1.00 mol/dm³ 3 If 0.25 mol of unknown element X has an atomic mass of 8, identify element X . A Helium B Sulfur C Germanium D Magnesium 4 The reaction below shows the extraction of iron from its oxide. 4H₂ (g) + Fe₃O₄ 3Fe (s) + 4H₂O (l) → If 2.16 g of water is produced from this reaction, what mass of iron is obtained from the extraction process? A 5.04 g B 6.10 g C 7.35 g D 8.12 g © chiasamuel 2025

3 5 30 g of magnesium is gradually added to excess water. The equation for the reaction is as shown below. Mg + 2H₂O → Mg(OH)₂ + H₂ What is the mass of water that is used in this reaction? A 20 g B 30 g C 35 g D 40 g 6 Which of the below statements is false about acids? A Acids dissociate in water to produce H⁺ ions. B The pH level of acids are generally lower than 7. C Acids react with metal carbonates to form salt, water and hydrogen gas. D Acids react with metal hydroxides, such that the resultant pH level is 7. 7 The table below provides information of three indicators used to identify the pH level of any chemical. pH 2 3 4 5 6 7 Methyl orange Red Yellow Methyl red Red Yellow Bromothymol blue Yellow Blue Which pH of a solution would cause the three indicators to have the same colour? A 3 B 4 C 5 D 6 © chiasamuel 2025

4 8 Which equation represents the ionic equation of reactions between NaOH and HCl? A H⁺ (aq) + OH⁻ (aq) → H₂O (l) B Na⁺ (aq) + Cl⁻ (aq) → NaCl (aq) C NaOH (aq) + HCl (aq) → N