MJC_H1_CHEM P1_Answer_Key

1 [Turn Over Class Reg Number Candidate’s Name: ___________________________ MERIDIAN JUNIOR COLLEGE JC 2 Preliminary Examination Higher 1 ________________________________________________________________________ Chemistry 8872/01 23 September 2015 Paper 1 Multiple Choice 50 minutes Additional Materials: OMR Sheet and Data Booklet ________________________________________________________________________ READ THESE INSTRUCTIONS FIRST This booklet contains Section A of your paper. Write your name, class and register number in the spaces provided at the top of this page. There are thirty questions in this section. Answer all questions. For each question, there are four possible answers labelled A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the OMR answer sheet. Read very carefully the instructions on the use of OMR answer sheet. You are advised to fill in the OMR Answer Sheet as you go along; no additional time will be given for the transfer of answers once the examination has ended. This document consists of 12 printed pages (including this cover page). Use of OMR Answer Sheet Ensure you have written your name, class register number and class on the OMR Answer Sheet. Use a 2B pencil to shade your answers on the OMR sheet ; erase any mistakes cleanly. Multiple shaded answers to a question will not be accepted. For shading of class register number on the OMR sheet, please follow the given examples: If your register number is 1, then shade 01 in the index number column. If your register number is 21, then shade 21 in the index number column.

2 [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 Iron poisoning in pregnant woman is usually caused by excessive in take of iron supplement pills. The amount of iron which will cause poisoning depends on the weight of the pregnant woman. It was found that as little as 325 mg of Fe 2+ can be fatal to a 70 kg pregnant woman. How many 325 mg FeSO 4 pills would it take to cause a fatal effect on a 50 kg pregnant woman? A 1 B 2 C 3 D 4 2 One mole of s ulfur dichloride dioxide, SO 2Cl2, reacts with water to give a mixture of sulfuric acid and hydrochloric acid. How many moles of barium hydroxide, Ba(OH)2, would be needed to exactly neutralise the resulting solution formed? A 1 B 2 C 3 D 4 3 Which one of the following statements is not true with regards to the reaction below? Cu2O(s) + H2SO4(aq)  Cu(s) + CuSO4(aq) + H2O(l) A The oxidation number of Cu in Cu2O is +1. B This is a disproportionation reaction. C H2SO4 is an oxidising agent. D Cu2O is a reducing agent. 4 The successive ionisation energies (IE) of two elements X and Y, are given below: IE / kJ mol–1 1st 2nd 3rd 4th 5th 6th 7th 8th X