2020 JC2 H1 Chem Prelim Paper 2 (QP)_16 Aug

Tampines Meridian Junior College 2020 JC2 Prelim H1 Chemistry CANDIDATE NAME CIVICS GROUP __________________________________________________________________________________ H1 CHEMISTRY 8873/02 Paper 2 Structured Questions 15 September 2020 2 hours Candidates answer on the Question Paper Additional Materials: Data Booklet READ THESE INSTRUCTIONS FIRST Write your name and Civics Group in the spaces at the top of this page. Write in dark blue or black pen on both sides of the paper. You may use an HB pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, glue or correction fluid. The use of an approved scientific calculator is expected, where appropriate. Section A Answer all the questions. Section B Answer one question only. The number of marks is given in brackets [ ] at the end of each question or part question. __________________________________________________________________________________ This document consists of 28 printed pages including 1 blank page. For Examiner’s Use Paper 1 MCQ / 30 Paper 2 Q1 / 14 Q2 / 11 Q3 / 10 Q4 / 13 Q5 / 12 Q6 / 20 Q7 / 20 / 80 Percentage / 100 Grade TAMPINES MERIDIAN JUNIOR COLLEGE JC2 PRELIMINARY EXAMINATION

2 Tampines Meridian Junior College 2020 JC2 Prelim H1 Chemistry Section A Answer all the questions in this section in the spaces provided. 1 (a) Sulfur is in the p block while calcium is in the s block of the Periodic Table. (i) State the electronic configuration of a Ca+ ion. Ca+ : ………..………………..………… [1] (ii) Draw and label the shape of a 3px orbital. [1] (iii) Beams of 40Ca+ ions and 32S2– ions were passed through an electric field. It was observed that a beam of 40Ca+ ions gives an angle of deflection of 2 as shown below. Sketch the path of the beam of 32S2– ions in the diagram above. Include the angle of deflection in your answer. [2] 40Ca+ source – + 2

3 Tampines Meridian Junior College 2020 JC2 Prelim H1 Chemistry (b) The diagram below gives the ionisation energies of five consecutive unknown elements J to N with atomic numbers less than 20. (i) Explain the increasing trend of the 1st ionisation energies from elements J to L. ……...…..………………..……………………………………………………………. ……...…..………………..……………………………………………………………. ……...…..………………..……………………………………………………………. ……...…..………………..……………………………………………………………. ……...…..………………..……………………………………………………………. ……...…..………………..……………………………………………………………. ……...…..………………..……………………………………………………………. ……...…..………………..………………………………………………………… [2] (ii) State, with reasoning, which Group element M belongs to. ……...…..………………..……………………………………………………………. ……...…..………………..……………………………………………………………. ……...…..………………..………………………………………………………… [2]