TMJC_2025_H2 Chem_P4_QP

CANDIDATE NAME CIVICS GROUP H2 CHEMISTRY 9729/04 Paper 4 Practical 3 September 2025 2 hours 30 minutes Candidates answer on the Question Paper. This document consists of 19 printed pages and 3 blank pages. READ THESE INSTRUCTIONS FIRST Write your name and Civics Group in the spaces at the top of the page. Give details of the practical shift and laboratory where appropriate, in the boxes provided. 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. Answer all questions in the spaces provided on the question paper. The use of an approved calculator is expected, where appropriate. You may lose marks if you do not show your working or if you do not use appropriate units. Qualitative Analysis Notes are printed on pages 21 and 22. The number of marks is given in brackets [ ] at the end of each question or part question. Shift Laboratory For Examiner’s Use 1 / 10 2 / 19 3 / 17 4 / 9 Total / 55 TAMPINES MERIDIAN JUNIOR COLLEGE JC2 PRELIMINARY EXAMINATION

2 Tampines Meridian Junior College 2025 JC2 Preliminary Examinations H2 Chemistry Answer all questions in the spaces provided. 1 Qualitative analysis tests involving solid iron(III) chloride FA 1 is a solution containing iron(III) chloride, FeCl3.nH2O FA 2 is a solution containing an unknown L– ligand Carry out the following tests. Record your observations in Table 1.1. Unless otherwise stated , the volumes given in Table 1.1 are approximate and should be estimated rather than measured. Test and identify any gases evolved. If there is no observable change, write no observable change. Table 1.1 Test Observations (a) (i) Add about 6 cm depth of FA1 into a test tube. Add aqueous silver nitrate in excess. Filter the mixture. Separate the filtrate into four test tubes for (iii), (iv), (v) and (vi). (ii) Place the filter funnel containing the residue on a new test tube, add aqueous ammonia over the residue and collect the filtrate. To this filtrate, add nitric acid dropwise until no further changes. (iii) To the first test tube containing the filtrate from (i), add 2 cm3 of hydrogen peroxide. Observe the mixture until no further changes are seen.

3 Tampines Meridian Junior College 2025 JC2 Preliminary Examination H2 Chemistry [Turn Over (iv) To the second test tube containing the filtrate from (i), add an equal volume of aqueous sodium hydroxide. Then add 2 cm3 of hydrogen peroxide. Observe the mixture until no further changes are seen. (v) To the third test tube containing the filtrate from (i), add 1 cm3 of FA 2. (vi) To the last test tube containing the filtrate from (i), add half a spatula of iron filings. Then add an equ