RGS_Chem_Y4_2022_PPA2

This Question Paper consists of 12 printed pages, including the cover page. [Turn Over] INSTRUCTIONS TO CANDIDATES Write your name and register number in the spaces provided. Write in dark blue or black ink. For Section A, indicate your answers on the separate Answer Sheet provided. Answer all other questions in the space provided. All quantitative answers should include appropriate units and significant figures. Omission of statements and working may result in loss of marks. INFORMATION FOR CANDIDATES The number of marks is given in brackets [ ] at the end of each question or part question. The use of an approved scientific calculator is expected, where appropriate. A copy of the Periodic Table is on page 12. The total number of marks for this paper is 40 and the weighting is 20%. Raffles Girls’ School (SECONDARY) Name: Class: Register No: CHEMISTRY YEAR FOUR Pen-and-Paper Assessment Friday 06 May 2022 1 hour For examiners’ use Question / Section Marks Obtained Section A / 10 1-10 Section B / 30 11 /4 12 /6 13 /11 14 /9 statement/ units/ sig. fig. Total 40 Established in 1879 Questions marked with an asterisk * are not tested in CBA 1 . Please skip these questions when doing your revision. Parent’s / Guardian’s Name: Signature: Date:

Raffles Girls’ School (Secondary) Year 4 Pen-and-Paper Assessment 2 2 Section A – Multiple Choice Questions [10 marks] Answer all questions. For each question, there are four possible answers ( A, B, C, and D). Choose the most appropriate answer and record your choice in the separate Answer Sheet provided. *1 The diagram shows the reactions of solution E. What are the ions present in solution E? A zinc ions and nitrate ions B lead(II) ions and chloride ions C aluminium ions and nitrate ions D ammonium ions and chloride ions *2 The following observations are recorded after tests are carried out on a green solid. Test 1: Upon strong heating, green solid turns black. Test 2: Effervescence is observed when dilute nitric acid is added to the green solid. Upon adding aqueous barium nitrate to the resultant mixture, no visible reaction is seen. What is the identity of the green solid? A iron(III) sulfate B iron(III) carbonate C copper(II) sulfate D copper(II) carbonate solution E white precipitate, soluble in excess NaOH(aq) gas turns moist red litmus paper blue white precipitate, insoluble in excess NH3(aq) add NaOH(aq) add excess NaOH(aq), Al, and heat add NH3(aq)

Raffles Girls’ School (Secondary) Year 4 Pen-and-Paper Assessment 2 [Turn Over] 3 *3 In an experiment, 4