2012 RVHS_H1 Chemistry Paper 1

1 River Valley High School 8872/01/PRELIM/12 [Turn over Prelim Examination 2012 Year 6 H1 Chemistry 8872 Paper 1 RIVER VALLEY HIGH SCHOOL YEAR 6 PRELIMINARY EXAMINATION CANDIDATE NAME CLASS 6 CENTRE NUMBER S INDEX NUMBER H1 CHEMISTRY 8872/01 Paper 1 Multiple Choice 21st September 2012 50 minutes 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, c entre number and 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. ________________________________________________________________________ This document consists of 12 printed pages.

2 River Valley High School 8872/01/PRELIM/12 [Turn over Prelim Examination 2012 Year 6 H1 Chemistry 8872 Paper 1 Section A For each question there are four possible answers, A, B, C and D. Choose the one you consider to be correct. 1 Methane was burned with a faulty Bunsen burner. As a result, a mixture of carbon dioxide and carbon monoxide was produced in a ratio of 98:2, together with water vapour. What was the volume of oxygen gas used when y dm3 of methane was burned? A dm3 B dm3 C dm3 D dm3 2 An ion of metal M can be oxidised by potassium manganate( VII) in acid solution to form MO3−. In an experiment, 1.25  10−3 mol of the ion of M required 37.5 cm 3 of 0.0200 mol dm−3 potassium manganate(VII) for complete reaction. What is the initial oxidation state of the ion of M? A +1 B +2 C +3 D +4 3 The table gives the successive ionization energies for element X. 1st 2nd 3rd 4th 5th 6th Ionization energies/kJ mol−1 950 1800 2700 4800 6000 12300 What could be the formula of the bromide of X? A XBr B XBr2 C XBr3 D XBr4

3 River Valley High School 8872/01/PRELIM/12 [Turn over Prelim Examination 2012 Year 6 H1 Chemistry 8872 Paper 1 4 Which of the following electrostatic attraction is not present in a sample of CH3F? A permanent dipole-permanent dipole interactions B instantaneous dipole-induced dipole interactions C hydrogen bonds D covalent bonds 5 Trimethoprim (TMP) is used for the treatment of urinary tract infections. It has the following structure: Trimethyoprim (TMP) N N C H H NH2 N HH OCH3 CH3O C H H H O Z yx w In which sequence is the bond angles quoted in decreasing order? A y > w > z > x B x > y > z > w C y > z > w > x D x > y > w > z 6 Which of the