IJC H2 CHEM P1

INNOVA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION 2 in preparation for General Certificate of Education Advanced Level Higher 2 CANDIDATE NAME CLASS INDEX NUMBER CHEMISTRY Paper 1 Multiple Choice Additional Materials: Data Booklet Multiple Choice Answer Sheet 9746/01 24 September 2009 1 hour 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 forty 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 16 printed pages. Innova Junior College [Turn over

2 PRELIM 2  INNOVA 2009 9746/01/09 [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 Consider the following half-equation. C 2O4 2– 2CO2 + 2e What volume of 0.01 mol dm -3 K 2Cr2O7 is required to oxidise 20 cm 3 of an acidified solution of 0.01 mol dm-3 FeC2O4? A 10 cm3 C 30 cm3 B 20 cm3 D 40 cm3 2 A sample containing a mmonium sulphate (M r = 132) was warmed with 100 cm 3 of 0.500 mol dm –3 sodium hydroxide. When the evolution of ammonia ceased, the excess sodium hydroxide solution was neutralised with 25.00 cm 3 of 0.500 mol dm –3 hydrochloric acid. What was the mass of ammonium sulphate in the sample? A 2.48 g C 6.60 g B 4.95 g D 13.20 g 3 The value of pV is plotted against V for 2 gases, an ideal gas and a non-ideal gas, where p is the pressure and V is the volume of the gas. Which of the following gases shows the greatest deviation from ideality? A hydrogen chloride C hydrogen B nitrogen D ammonia pV Ideal gas Non-ideal gas V

3 4 The ions P 3–, S 2– and C l – have radii 0.212 nm, 0.184 nm and 0.181 nm respectively. Which one of the following correctly explains the decrease in radius in going from P3– to Cl –? A An increase in total number of electrons and in the nuclear charge. B An increase in total number of electrons with the nuclear charge remaining constant. C A constant total number of electrons and an increase in the nuclear charge. D A decrease in the total number of electrons and an increase in the nuclear charge. 5 Three substances, E, F and G have physical properties as shown. Electrical conductivity in Substance Melting point / °C Boiling point / °C solid state liquid state E 801 1413 Poor Good F 2852 3600 Poor Good G 3550 4827 Good Not known What could be the identities of E, F and G? E F G A NaBr CaO SiO 2 B NaI Al2O3 Diamond C NaF BeCl2 Cu D NaCl MgO Graphite 6 Which of the following pairs of compounds is the bond angle in particle I greater than that in particle II? I II A PH3 BH 3 B NO3 − ClO2 − C SF6 ClF3 D I3 - BeCl2 PRELIM 2  INNOVA 2009 9746/01/09 [Turn over

4 7 Gas X reacts with gas Y according t o the following equation X(g) + Y(g) XY(g) The rate equation for the reaction is rate = k[X][Y]2 Which of the following statements is correct at constant temperature? A Doubling the concentration of X and of Y, will double the rate of reaction. B Halving the concentration of Y, keeping the concentration of X constant, will decrease the rate by a factor of 8. C Tripling the concentration of both X and Y will increase the rate by a factor of 27. D Quadrupling the concentration of Y, keeping the concentration of X constant, will increase the rate by a factor of 8. 8 Two equilibria are shown below. Reaction I: X 2Y(g) X2(g) + ½ Y2(s) Reaction II: 2X 2(g) + Y2(s) 2X2Y(g) The numerical value of Kc for reaction I is 2. Under the same conditions, what is the numerical value of Kc for reaction II? A 1 4 C 1 2 B 4 D 1 2 9 A mixture of nitrogen monoxide and carbon dioxide will form an equilibrium mixture as shown by the equation. NO (g) + CO2 (g) NO2 (g) + CO (g) If 2.0 mol of nitrogen monoxide and 2.0 mol of carbon dioxide are allowed to reach equilibrium, 20 % of the resulting mixture is nitrogen dioxide. What is the value of the equilibrium constant Kc, at the temperature of this experiment? A 2 3 B 4 9 C 1 4 D 1 16 PRELIM 2  INNOVA 2009 9746/01/09 [Turn over

5 10 The solubility product values of silver compounds, at 25oC, are given in table below. Compound Solubility products at 25oC silver carbonate 8 x 10-12 mol3 dm-9 silver ethanoate 2 x 10-3 mol2 dm-6 A solution mixture S contains 0.05 mol dm-3 with respect to carbonate and ethanoate ions. What will happen when equal volumes of solution S and 0.1 mol dm -3 aqueous silver nitrate are mixed together? A Only silver carbonate is precipitated. B Only silver ethanoate is precipitated. C Both silver carbonate and silver ethanoate are precipitated. D No precipitate is formed. 11 The e.m.f. of the cell Pt(s)|H2(g)|H+(aq)||Ag+(aq)|Ag(s) would be increased by A increasing the concentration of H+(aq). B increasing the surface area of the Pt electrode. C increasing the concentration of Ag+(aq). D decreasing the pressure of H2(g). 12 The radius and charge of each of six ions are shown below: The ionic solids AX, BY and CZ are of the same lattice type. What is the correct order of their lattice energies placing the one with the highest numerical value first? Ion A + B + C 2+ X – Y – Z 2– Radius / nm 0.21 0.27 0.23 0.21 0.27 0.23 A CZ  AX  BY C CZ  BY  AX B AX  CZ  BY D AX  BY  CZ PRELIM 2  INNOVA 2009 9746/01/09 [Turn over

6 13 The enthalpy change of reaction between zinc and hydrochloric acid can be measured in the laboratory. Zn (s) + 2HCl (aq) ZnCl2 (aq) + H2 (g) What information, other than that obtained in this experiment, is needed to calculate a value for the enthalpy change of formation of aqueous ZnC l2? A lattice energy of zinc (II) chloride B enthalpy change of formation of zinc C enthalpy change of formation of aqueous H+ and Cl– ions. D first and second ionisation energies of zinc 14 When the molecule below is heated with hydrogen gas in the presence of nickel catalyst, how many chiral centres does the product molecule possess? CH3 CH3 CH(CH3)2 O COOH CH2OH A 5 C 6 B 7 D 8 15 Which of the following reagents could not be used to distinguish between compound X and Y? A I2 in NaOH (aq) C Cu2+ in alkaline solution B PCl5 D acidified potassium dichromate PRELIM 2  INNOVA 2009 9746/01/09 [Turn over

7 16 Compound Q has the following properties. (i) It produces white fumes when PC l5 is added. (ii) It does not react with Na 2CO3 but forms a soluble salt in aqueous NaOH. (iii) It gives an orange precipitate with 2,4–dinitrophenylhydrazine. Which one of the following could be Q? A COCH3 OH C COOH CH2COCH3 B OH CH2CH2CHO CH2OH D COOCH3 CH2CH2OH 17 Wedelolactone, the naturally