JJC_H1_CHEM_P1_Qn

JURONG JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION Higher 1 CHEMISTRY 8872/01 Paper 1 Multiple Choice 17 September 2015 50 minutes Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and shade your exam index number on the Answer Sheet in the spaces provided. There are thirty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate. A Data Booklet is provided. Do not write anything on the Data Booklet. This document consists of 13 printed pages and 1 blank page. [Turn over

2 Jurong Junior College 8872/01/J2Preliminary Examination/2015 [Turn Over SECTION A For each question there are four possible answers, A, B, C and D. Choose the one you consider to be correct. 1 9 4Be is used in the production of ‘fast neutrons’. How many neutrons are present in 0.09 g of 9 4Be ? [L = Avogadro constant] A 0.01 L B 0.04 L C 0.05 L D 0.09 L 2 Use of the Data Booklet is relevant to this question. Ferrochrome, an alloy of iron and chromium, can be dissolved in dilute sulfuric acid to produce a mixture of FeSO 4 and Cr 2(SO4)3. The FeSO 4 reacts with Na 2Cr2O7 in acid solution according to the following equation. 14H+ + 6Fe2+ + Cr2O7 2−  2Cr3+ + 6Fe3+ + 7H2O When 1.00 g of ferrochrome is dissolved in dilute sulfuric acid, and the resulting solution titrated, 13.10 cm 3 of 0.100 mol dm−3 Na2Cr2O7 is required for complete reaction. What is the percentage by mass of Fe in the sample of ferrochrome? A 1.22 B 4.39 C 12.2 D 43.9 3 Use of the Data Booklet is relevant to this question. In an experiment, a sample of Americium element (Am) was vaporised, ionised and passed through an electric field. Analysis revealed that a beam of 241Am+ gives an angle of deflection of 2°. What would be the angle of deflection for a sample of singly charged calcium ions? A 12.0° B 6.0° C 2.0° D 0.3° 4 Use of the Data Booklet is relevant to this question. In some types of spectroscopy, it is important to know if ions are isoelectronic. Which ion is not isoelectronic with K+? A Ca2+ B Cl− C S2− D Ti3+

3 Jurong Junior College 8872/01/J2Preliminary Examination/2015 [Turn Over 5 Use of the Data Booklet is relevant to this question. Some isotopes ar