NYJC_H2_Chemistry_P1 Prelim

NANYANG JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION Higher 2 CHEMISTRY 9647/01 Paper 1 Multiple Choice 26 September 2014 1 hour Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and tutor’s name on the Answer Sheet in the spaces provided unless this has been done for you. 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 you 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 22 printed pages and 0 blank page. [Turn over

2 H2 Chemistry 9746/01 NYJC J2/14 PX Section A For each question there are four possible answers, A, B, C and D. Choose the one you consider to be correct. 1 0.02 mol of CxHyNO2 was burned in excess of oxygen as shown by the equation below. CxHyNO2 + aO2  xCO2 + NO2 + 2 y H2O The gases that were produced were first passed through a U -tube containing phosphorus pentoxide and then bubbled through 0.25 mol of NaOH(aq). The equations illustrating the reactions of the gases with NaOH(aq) are as shown below. CO2 + 2NaOH  Na2CO3 + H2O 2NO2 + 2NaOH  NaNO2 + NaNO3 + H2O The phosphorus pentoxide U -tube increased in mass by 1.15 g and the excess NaOH required 40.00 cm3 of 0.875 mol dm3 H2SO4 for complete reaction. What is the ratio of x:y? A 2:3 B 4:3 C 4:7 D 8:7 2 Which of these samples of gas contains half the number of atoms as 1 g of hydrogen (Mr : H2, 2)? A 22 g of carbon dioxide (Mr : CO2, 44) B 8 g of methane (Mr : CH4, 16) C 20 g of neon (Mr : Ne, 20) D 8 g of ozone (Mr : O3, 48)

3 H2 Chemistry 9746/01 NYJC J2/14 PX [Turn over 3 Which transition metal ion in the following species has one more elec tron in the third quantum shell than in the second quantum shell? A [Cu(EDTA)]2- B [Fe(H2O)5(SCN)]2+ C [Ni(NH2CH2CH2NH2)3]2+ D [VO(C2O4)2(H2O)]2 4 Which of the following statements about the properties associated with ionic and covalent bonds is correct? A The only coval ent compounds with high melting points are those in which hydrogen bonds occur. B Any covalent compound that contains both oxygen and hydrogen in its molecule forms hydrogen bonds. C Ionic bonds and covalent bonds cannot both occur in the same compound. D Ionic compounds differ from metals in that ionic compounds do not conduct electricity in the solid state. 5 For a fixed mass of an ideal gas, which of the following graphs does not have the same general shape as the graph of V/T against T plotted at constan