2023_DHS_H2_Chem_Prelim_Paper_1_QP

© DHS 2023 9729/01 [Turn over Name: Centre/Index Number: Class: DUNMAN HIGH SCHOOL Preliminary Examination Year 6 H2 CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Data Booklet 9729/01 25 September 2023 1 hour READ THESE INSTRUCTIONS FIRST Write your centre number, index number, name and class at the top of this page. Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. There are thirty 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. The use of an approved scientific calculator is expected, where appropriate . This document consists of 25 printed pages and 1 blank page. This document consists of 15 printed pages and 1 blank page.

2 © DHS 2023 9729/01 1 Use of the Data Booklet is relevant to this question. Sulfur and X are adjacent elements in Group 1 6 of the Periodic Table. X and Y are adjacent elements in the same period of the Periodic Table. The table shows the atomic radius of these elements. element sulfur X Y atomic radius / nm 0.088 0.103 0.114 What is the proton number of Y? A 7 B 9 C 33 D 35 2 Use of the Data Booklet is relevant to this question. What is the order of increasing seventh ionisation energy for the elements shown? Se Br Kr A Br < Kr < Se B Kr < Se < Br C Kr < Br < Se D Se < Kr < Br 3 Hexane is immiscible with water. Which statements help to explain this observation? 1 There are stronger instantaneous dipole-induced dipole interactions in hexane than in water. 2 Hexane molecule is non-polar while water molecule has an overall dipole moment. 3 The O –H bonds in water molecules are stronger than the C–H bonds in hexane molecules. 4 The interactions formed between hexane and water molecules are weaker than the hydrogen bonds in water. A 1, 2 and 4 only B 2 and 4 only C 1 and 2 only D 1 and 3 only 4 Which row correctly describes the structure and bonding present in the solid lattice of the

3 © DHS 2023 9729/01 [Turn over given substance? substance structure bonding A ice giant molecular covalent and hydrogen bonding B iodine simple molecular covalent bonding and permanent dipoles C sodium sulfate giant ionic ionic and covalent bonding D copper giant metallic ionic bonding 5 The following equilibrium exists in a sample of aluminium chloride vapour. Al2Cl6(g) ⇌ 2AlCl3(g) When 1.50 g of aluminium chloride was introduced into an evacuated flask of 250 cm 3 capacity and heated to 227 °C, the pressur