SRJC_H1_CHEM_P1

1 SERANGOON JUNIOR COLLEGE General Certificate of Education Advanced Level Higher 1 CHEMISTRY 8872/01 PRELIMINARY EXAMINATION 28 August 2009 Paper 1 50 min Additional Materials: Data Booklet Multiple Choice Answer Sheet READ T HESE INSTRUCTIONS FIRST Write your name, index number on the OMS Sheet in the spaces provided. Write in soft pencil. There are thirty questions in this paper. 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 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. 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 question paper. This document consists of 14 printed pages and 0 blank page. SRJC 2009 8872/01/PRELIM/2009 [Turn Over

2 Answer ALL Questions 1 0.5 g of zinc powder was found to reduc e an acidified solution of 25.50 cm 3 of 0.200 mol dm-3 VO2 +. Which one of the following is the reduced product of VO2 +? A VO3 - B VO2+ C V3+ D V2+ 2 3.920 g of an oxide of formula MO was completely dissolved in 30.0 cm 3 of 2.00 mol dm -3 sulphuric acid. The resulting solution was made up to 100 cm 3. 25.0 cm 3 of this solution wa s neutralised by 27.5 cm 3 of 0.100 mol dm-3 sodium hydroxide. What is the relative molecular mass of M? A 48.6 B 54.9 C 55.9 D 101.0 3 One of the isotopes of carbon is carbon-14. Carbon-14 is radioactive and is used in carbon dating by archaeologists. Which one of the following species has the same number of neutrons and electrons as an atom of carbon-14? A 13C B 14N+ C 16O2+ D 17F+ 4 The electronic configurations of two atoms, E and F , are 1s 22s22p3 and 1s 22s22p4 respectively. Compare the first and second ionisation energies of E and F. 1st I.E. 2nd I.E. A E < F E > F B E < F E < F C E > F E > F D E > F E < F SRJC 2009 8872/01/PRELIM/2009 [Turn Over

3 5 Polyurethane is used in coatings, insulators and adhesiv es. Polyurethane What are the values of the bond angles marked x and y in polyurethane? x y A 90 90 B 120 120 C 107 120 D 109.5 90 C O N H CC H H H H N H C O OCC H H H H SRJC 2009 8872/01/PRELIM/2009 [Turn Over 6 Oxygen reacts with nitrogen monoxide in the equation shown. O2 (g) + 2 NO (g)  2 NO2 (g)