RGS_2020_Y4_CHEM_PPA2

This Question Paper consists of 12 printed pages including the cover page. [Turn Over INSTRUCTIONS TO CANDIDATES This question paper contains two sections. Section A - Answer ALL the questions and record your answers on the OMR answer sheet. Section B - Answer ALL the questions and write your answers in the spaces provided. Use only a black or dark blue pen. Do not use correction tape or fluid. Omission of essential working or units, or expressing answers with incorrect significant figures will result in a loss of marks. INFORMATION FOR CANDIDATES The number of marks is given in brackets [ ] at the end of each question or part question. The total number of marks for this paper is 40. A copy of the Periodic Table on page 12 is provided for your reference. The weightage for this paper is 0%. Name: Class: 4 / Register No: CHEMISTRY YEAR FOUR Pen-and-Paper Assessment 2 (Formative) Wednesday 10 June 2020 1 hour Established in 1879 Raffles Girls’ School (SECONDARY) For examiners’ use Section / Question Marks Obtained A 10 B1 4 B2 6 B3 8 B4 12 Working Statement Units Significant Figures Total marks 40 Parent’s / Guardian’s Name: ___________________________________ Signature: ________________________ Date: _____________

Raffles Girls’ School (Secondary) Year 4 Pen-and-Paper Assessment 2 (Formative) 2 Section A – Multiple Choice Questions [10 marks] There are 10 questions in this section. 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 on the OMR answer sheet. 1 Statement 1: Hydrogen is used as a fuel. Statement 2: When hydrogen burns in the air to form water, heat energy is produced. Which of the following is correct? A Both statements are correct and statement 2 explains statement 1. B Both statements are correct but statement 2 does not explain statement 1. C Statement 1 is correct but statement 2 is incorrect. D Statement 2 is correct but statement 1 is incorrect. 2 A sample of nitrogen gas contains the same number of atoms as found in 2.00 g of helium gas. What is the mass of the sample of nitrogen gas? A 2.00 g B 7.00 g C 14.0 g D 28.0 g 3 A metal M forms a chloride salt of formula MCl. What is the formula of the oxide of M? A MO B M2O C MO2 D M2O3 4 The diagram shows a match. By striking the match, a chemical reaction takes place. Which row describes this chemical reaction? type of reaction reason A endothermic Energy is taken in as the match burns. B endothermic Energy is giv