2022 DHS Y6 H2 Prelim Paper 1_QP

© DHS 2022 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 23 September 2022 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 2022 9729/01 1 Beams of charged particles are deflected by an electric field. Under identical conditions, the angle of deflection of a particle is proportional to its charge/mass ratio. In an experiment, protons are deflected by an angle of +15  by an electric field. In another experiment under identical conditions, particle Y is deflected by an angle of –5. What could be the composition of particle Y? protons neutrons electrons A 1 2 1 B 3 3 5 C 4 5 1 D 4 5 3 2 The first ionisation energies of four elements with consecutive atomic numbers below 20 are shown on the graph. One of the elements reacts with hydrogen to form a covalent compound with formula HX. Which element could be X? 3 Which molecule does not have any 90 or 180 bond angles? 1 O3 2 PF5 3 [PCl4]+ 4 SF6 A 1 and 3 only B 2 and 4 only C 1, 2 and 4 only D 3 only first ionisation energy / kJ mol−1 atomic number A D B C

3 © DHS 2022 9729/01 [Turn over 4 Which molecule has the largest overall dipole moment? A B C D CH3 CH3 H H CH3 CH3 O Cl CH3 H3C Cl Cl Cl O 5 The value of pV is plotted against p for two gases, an ideal gas and a non-ideal gas, where p is the pressure and V is the volume of the gas. Which gas shows the greatest deviation from ideal gas behaviour at 273 C? A CO2 B Cl2 C CH3OH D N2H4 6 X and Y are oxides of different elements in Period 3. If one mole of X is added to water, the solution formed is neutralised by exactly one mole of Y. What could be the identities of X and Y? X Y A P4O10 Al2O3 B SO3 Al2O3 C P4O10 Na2O D SO3 Na2O non-ideal gas pV p ideal gas

4 © DHS 2022 9729/01 7 Which factor contributes to the difference in thermal stability between CaCO3 and BaCO3? A The polarisa