PJC_H2_CHEM_P1_Ans.pdf - PIONEER JUNIOR COLLEGE JC2...

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PIONEER JUNIOR COLLEGE JC2 PRELIMINARY EXAMINATION HIGHER 2 CANDIDATE NAME CT INDEX GROUP NUMBER CHEMISTRY 9729/01 Paper 1 Multiple Choice 22 September 2017 1 hour 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, Centre number and index number on the Answer Sheet in the spaces provided unless this has been done for you. 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. 1 6 S This document consists of 15 printed pages
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© PJC 2017 9729/01/JC2 Prelim/2017 [Turn over Section A For each question, there are four possible answers labelled A , B , C and D . Choose the one you consider to be correct. 1 Equal volumes of 1 mol dm 3 hydrogen sulfide and sulfur dioxide (each containing a different isotope of sulfur) are mixed to precipitate sulfur according to the equations shown below: H 2 32 S(aq) 32 S(s) + 2H + (aq) + 2e 34 SO 2 (aq) + 4H + (aq) + 4e 34 S(s) + 2H 2 O( l ) What is the relative atomic mass of the sulfur precipitated? A 32.1 B 32.7 C 33.0 D 33.3 2 50 cm 3 of a 0.0400 mol dm -3 solution of acidified Fe 2+ was oxidised to Fe 3+ by 100 cm 3 of 0.0100 mol dm -3 of an oxidising agent, XO 3 . What is the final product of X ? A X O 2 B X O C X O 2 D X A Oxygen B Chlorine C Scandium D Vanadium 3 Paramagnetism refers to the magnetic state of an atom with one or more unpaired electrons. The greater the number of unpaired electrons in an atom, the greater the paramagnetism. Which atom has the greatest paramagnetism? 2
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