RVHS_H2_CHEM_P1_QP_RV Prelim

River Valley High School 9647/01/PRELIM/14 2014 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 26 September 2014 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 19 printed pages and 1 blank page.

2 River Valley High School 9647/01/PRELIM/14 2014 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 Wines often contain a small amount of sulfur dioxide that is added as a preservative. The sulfur dioxide content of a wine is found by the following method: A 50 cm 3 sample of white wine is reacted with 40.0 cm 3 of 0.01 mol dm 3 of excess aqueous iodine. The sulf ur dioxide in the wine is oxidi sed to sulf ate, SO 4 2−, in the process. The unreacted io dine requires exactly 23.60 cm 3 of 0.02 mol dm −3 sodium thiosulfate, Na2S2O3, for complete reaction. Determine the concentration of sulfur dioxide, in mol dm−3, in the wine. A 1.64  104 B 3.28  103 C 4.72  103 D 9.44  103 2 An ion X2+ contains 24 protons. What is the electronic configuration of X3+? A 1s2 2s2 2p6 3s2 3p6 3d3 B 1s2 2s2 2p6 3s2 3p6 3d4 C 1s2 2s2 2p6 3s2 3p6 3d1 4s2 D 1s2 2s2 2p6 3s2 3p6 3d5 4s1

3 River Valley High School 9647/01/PRELIM/14 2014 Preliminary Examination II 3 Hydroxylamine (NH2OH) can react with propanone via a nucleophilic addition in the following manner: What are the values of the bond angles y and z? y z A 109.5 118 B 90 118 C 109.5 180 D 90 180 4 Which graph correctly describes the behaviour of fixed masses of the ideal gases L and M where the number of moles of L is greater than number of moles of M? A B C D y z

4 River Valley High School 9647/01/PRELIM/14 2014 Preliminary Examination II 6 A typical protein forms hundreds of hydrogen bonds and thousands of van der Waals’ forces in folding from primary to tertiary structures. Which of the following thermodynamic state functions of the protein best represents the folding process? G / kJ mol–1 H / kJ mo