2021 DHS H2 Prelim Paper 1_Questions

© DHS 2021 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 27 September 2021 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 15 printed pages and 1 blank page.

2 © DHS 2021 9729/01 2 Use of the Data Booklet is relevant to this question. The table shows the fifth, sixth, seventh, eighth, ninth and tenth ionisation energies of an element (Z ≤ 20) in the Periodic Table. 5th 6th 7th 8th 9th 10th ionisation energy / kJ mol–1 7975 9590 11343 14944 16964 48610 What can be inferred about the element from the above data? A It is in Group 2 of the Periodic Table. B It is in the third period of the Periodic Table. C Its 6th and 7th electrons are removed from different subshells. D It is likely to form an ionic compound when reacted with oxygen. 3 Which pair has the same shape? A BeCl2 and SO2 B CO2 and I3− C NO3− and PH3 D PO43− and SF4 1 Which ion has the same number of electrons and neutrons as Re3+75187? A W2+74182 B W+74186 C Os4+76188 D Os3+76189

3 © DHS 2021 9729/01 [Turn over 4 Which lattice structure is correctly described? lattice structure description A giant molecular lattice of molecules held together by strong covalent bonds B giant ionic each cation is only bonded to the anion to which electrons are transferred C giant metallic all electrons are delocalised within the metal cation lattice D simple molecular molecules held together by weak intermolecular forces 5 A gaseous sample containing x dm3 of gaseous methanol was burnt in 4x dm3 of oxygen to produce carbon dioxide and water vapour. The total pressure in the system after combustion was P. Which statement(s) is/are correct? 1 Methanol reacts with oxygen in a 2 : 3 mole ratio. 2 The partial pressure of carbon dioxide in the system is 0.18P. 3 Assuming these gases behave ideally, they occupy an insignificant volume. A 1, 2 and 3 B 1 and 2 only C 2 and 3 only D 1 only 6 The s– and p–block elements in Period 4 show a similar pattern of properties to the elements in Period 3. On this basis, which prediction can be made about element 33, ars