2024 Prelims RVHS H2 Chem P2 (QP)

River Valley High School 9729/02/PRELIM/24 [Turn over 2024 Preliminary Examination RIVER VALLEY HIGH SCHOOL JC 2 PRELIMINARY EXAMINATION CANDIDATE NAME CLASS 2 3 J CENTRE NUMBER S INDEX NUMBER H2 CHEMISTRY 9729/02 Paper 2 Structured Questions 09 September 2024 2 hours Candidates answer on the Question Paper. Additional Materials: Data Booklet READ THESE INSTRUCTIONS FIRST Write your Centre number, index number, class and name on all the work that you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions in the spaces provided on the Question Paper. If additional space is required, you should use the page at the end of this booklet . The question number must be clearly shown. 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 Question Number 1 2 3 4 5 Marks 19 10 10 15 21 significant figures units Total 75 This document consists of 25 printed pages and 3 blank pages.

2 River Valley High School 9729/02/PRELIM/24 2024 Preliminary Examination 1 (a) Use of the Data Booklet is relevant to this question. Deuteron is the nucleus of deuterium, 2 1D . (i) Compare and account for the behaviour of protons in an electric field with hydrogen atoms and deuterons. …………………………..………………..………………………………….......... ……………………………..………………………………………………............ ………………………..……………………………………………………............ ………………………..……………………………………………………............ ………………………..……………………………………………………............ [2] (ii) Suggest a value for the enthalpy change to form 1 mole of deuteron from deuterium atoms. Explain your answer. …………………………..………………..………………………………….......... ……………………………..………………………………………………............ ………………………..……………………………………………………............ ………………………..……………………………………………………............ ………………………..……………………………………………………............ [2] (b) Fig. 1.1 shows the first seven ionisation energies for nickel and two other main group elements, A and B. Fig. 1.1

3 River Valley High School 9729/02/PRELIM/24 [Turn over 2024 Preliminary Examination (i) Write the electronic configuration of nickel. …………………………..………………..…………………………………........ [1] (ii) Element A and nickel are found in the same period of the Periodic Table, but element B is not. Explain the following features of Fig. 1.1. • same general trend for all atoms • element A show large jump in values from the 2 nd to the 3 rd ionisation energy but not nickel. ………………………………....……………………………………………........ …………………………..……………………………………………................. …………………………..……………………………………………................. …………………………..……………………………………………......