RVHS Prelim P1_QP

River Valley High School 9647/01/PRELIM/15 2015 Preliminary Examination II RIVER VALLEY HIGH SCHOOL YEAR 6 PRELIMINARY EXAMINATION (II) CANDIDATE NAME CLASS 6 CENTRE NUMBER S INDEX NUMBER H2 CHEMISTRY 9647/01 Paper 1 Multiple Choice 25 September 2015 1 hour Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class, centre number and index number on the Answer Sheet in the spaces provided. There are forty 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. This document consists of 15 printed pages and 1 blank page.

2 River Valley High School 9647/01/PRELIM/15 2015 Preliminary Examination II Section A For each question there are four possible answers, A, B, C, and D. Choose the one you consider to be correct. 1 At 35 C and 1 atm, ozone (O3) reacts with water to give hydrogen and oxygen gas. O3(g) + H2O(l)  H2(g) + 2O2(g) Given that gases expand by 14.3 % when heated from standard temperature to 35 C, calculate the volume of gas collected when 0.15 g of water is required to fully react with a sample of ozone at 35 C? A 560 cm3 B 600 cm3 C 640 cm3 D 800 cm3 2 Radioactive decay is the process where an unstable atom loses energy by emitting radiation. 14C is an isotope of carbon that has a tendency to lose energy by undergoing -decay, where a neutron changes into a proton and an electron. What is the product after 14C undergoes -decay? A 13C B 14C C 13N D 14N 3 Which of the following is true when SO2 is changed to SO3 2? Total number of electrons around S Bond angle A Increases from 10 to 12 Increases from 107 to 120 B Increases from 10 to 14 Decreases from 180 to 120 C Remains the same Decreases from 120 to 107 D Remains the same Decreases from 180 to 120 4 When one mole of water is formed from the reaction between solid Ba(OH) 2 and HNO3, 58.4 kJ of heat is released. Calculate the final temperature of the solution when 2.56 g of solid Ba(OH) 2 is added to 200 cm3 of 0.500 mol dm3 HNO3 at room temperature? A 22.6 C B 24.0 C C 26.4 C D 27.1 C

3 River Valley High School 9647/01/PRELIM/15 2015 Preliminary Examination II 7 Two electrode potentials are given: V2+ + 2e ⇌ V E = 1.20 V Zn2+ + 2e ⇌ Zn E = 0.76 V Which species is the strongest reducing agent? A Zn2+ B V2+ C V D Zn 5 Enthalpy changes for the following reactions were determined experimentally: H2(g