IJC_2008_H1 Chemistry_Prelim II_Paper1

INNOVA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATIONS 2 in preparation for General Certificate of Education Advanced Level Higher 1 CANDIDATE NAME CLASS INDEX NUMBER CHEMISTRY Paper 1 Multiple Choice Additional Materials: Data Booklet Multiple Choice Answer Sheet 8872/01 17 September 2008 50 min READ THESE INSTRUCTIONS FIRST Write your name and class on all the work you hand in. Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. 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 10 printed pages and 0 blank pages. Innova Junior College [Turn over

2 Section A For each question there are four possible answers, A, B, C and D. Choose the one you consider to be correct. 1 Acidified aqueous potassium dichromate(VI) oxidizes ethanedioate ions, C2O4 2-, to CO2. What volume of 0.020 mol dm -3 potassium dichromate(VI) is required to oxidize completely 1.0 x 10-3 mol of the salt KHC2O4·H2C2O4? A 17 cm3 C 50 cm3 B 33 cm3 D 125 cm3 2 Nervous disorders due to mercury poisoning occur when mercury forms a 1:1 complex with lipoyl groups, which are vital for glucose metabolism. For a human containing 3.0 kg of body fluid, what is the mass of mercury (Ar 200) required to complex all the lipoyl groups? [Average concentration of lipoyl groups in body fluid = 1.0 x 10-8 mol kg-1] A 1.5 x 10-9 g C 6.0 x 10-8 g B 3.0 x 10-8 g D 6.0 x 10-6 g 3 When methane, CH4, was burned in an incorrectly adjusted burner, it was converted into a mixture of carbon dioxide and carbon monoxide in the ratio 99:1, together with water vapour. What is the volume of oxygen consumed when 4 dm 3 of methane is burned? A 7.98 dm3 C 3.98 dm3 B 7.96 dm3 D 3.96 dm3 4 Which of the following atoms or ions has 1 unpaired electron? A N– B O C S2– D Sc 5 Which one of the following equations relates to the first ionization energy of bromine? A Br (l) Br + (g) + e– B Br (g) Br + (g) + e– C 12 Br2 (l) Br 2 – (g) – e– D 12 Br2 (g) Br 2 – (g) + e– © INNOVA 2008 8872/01/2008 [Turn over

3 6 In which of the following will an ionic compound be formed between the named atoms? A Hydrogen and sodium B Hydrogen and chlorine C Boron and fluorine D Silicon and chlorine 7 Why is ethanol more soluble than e