2023 VJC H2 Chem Prelim P2 (QP)

© VJC 2023 9729/02/PRELIM [Turn over CANDIDATE NAME CT GROUP VICTORIA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATIONS Higher 2 ……………………………………………….………….. …………………………….. CHEMISTRY 9729/02 Paper 2 Structured Questions Candidates answer on the Question Paper. 15 September 2023 2 hours Additional Materials: Data Booklet READ THESE INSTRUCTIONS FIRST Write your index number, name and CT group in the spaces at the top of this page. Write in dark blue or black pen. You may use a HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Answer all questions in the spaces provided on the Question Paper. The use of an approved scientific calculator is expected, where appropriate. A Data Booklet is provided. The number of marks is given in brackets [ ] at the end of each question or part question. For Examiner’s Use 1 / 7 2 / 18 3 / 10 4 / 15 5 / 15 6 / 10 Total / 75 This document consists of 24 printed pages and 2 blank pages.

2 © VJC 2023 9729/02/PRELIM 1 (a) State three ways in which an ideal gas differs from a real gas. ……………………...………………………………………………………………….............. ……………………...………………………………………………………………….............. ……………………...………………………………………………………………….............. ……………………...………………………………………………………………….............. ……………………...………………………………………………………………….............. ……………………...………………………………………………………………….............. ……………………...………………………………………………………………….............. ……………………...………………………………………………………………….............. ……………………...………………………………………………………………….............. [3] (b) (i) Draw a labelled diagram to show the significant force of attraction between two molecules of hydrogen fluoride. Include the name of the attraction in your diagram. [2]

3 © VJC 2023 9729/02/PRELIM [Turn over (ii) The value of pV/RT is plotted against p for 1 mol of an ideal gas and 1 mol of fluorine gas at 300 K, where p is the pressure and V is the volume of the gas. On the same axes, sketch the variation of pV/RT against p for one mole of hydrogen fluoride, HF, at the same temperature of 300 K. Briefly explain your answer. ……………………...…………………………………………………………………... ……………………...…………………………………………………………………... ……………………...…………………………………………………………………... ……………………...…………………………………………………………………... ……………………...…………………………………………………………………... ……………………...…………………………………………………………………... [2] [Total: 7] pV/RT p 1.0 ideal gas fluorine

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