VJC 2022 JC1 Promo H2 Chem P1 MCQ QP

1 © VJC 2022 9729/01/Promo2022 [Turn Over VICTORIA JUNIOR COLLEGE JC 1 PROMOTIONAL EXAMINATIONS Higher 2 CHEMISTRY 9729//01 Paper 1 Multiple Choice 30 September 2022 1 hour Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your index number, name and CT group on the Answer Sheet. There are thirty questions. 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. A Data Booklet is provided. 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. The use of an approved scientific calculator is expected, where appropriate. This document consists of 13 printed pages and 1 blank page.

2 © VJC 2022 9729/01/Promo2022 For each question there are four possible answers, A, B, C, and D. Choose the one you consider to be correct. 1 Use of the Data Booklet is relevant to this question. In 2011, two new elements were added to the Periodic Table. Both elements had been made artificially and were called flerovium (Fl) and livermorium (Lv). Fl Lv proton number 114 116 nucleon number 289 292 Which statements about these elements are correct? 1 A Lv+ ion has the same number of electrons as a Fl− ion. 2 A beam of Lv3+ ions is deflected by a smaller angle in an electric field as compared to a beam of Fl2– ions. 3 A Lv atom has the same electronic configuration as a Fl 2– ion. A 1, 2 and 3 only B 1 and 2 only C 1 and 3 only D 3 only 2 The graph shows the first thirteen ionisation energies for element X. X reacts with excess oxygen to form a compound, Y. Y contains the peroxide ion, O22–. What is the formula of compound Y? A XO B XO2 C X2O D X2O2 ionization energy number of electrons removed

3 © VJC 2022 9729/01/Promo2022 [Turn Over 3 Cyanamide, NH2CN, can form a product with boron trifluoride, BF3. What could be a possible structure of the product? A B F F F N C N HH C B F F F N C N HH B B F F F N C N H H D B F F F NCN H H + _ 4 Which one of the following pairs of compounds shows the same shape and similar bond angles? A POCl3 and CCl4 B AlCl3 and NCl3 C SO2 and CO2 D ClF3 and SF4 6 Silicon carbide is a shiny, hard chemically inert material with a very high melting point. It can be used to sharpen knives and make crucibles. Which type of structure explains these properties? A a giant structure with covalent bonds between silicon and carbon atoms B a giant structure containing metallic bonding C a giant layer structure with covalent bonds between atoms and van der Waals’ forces between the layers D a simple molecular structure with covalent bonds between the atoms of silicon and carbon 5 In which of the following pairs does the first substance have a lower boiling point than the second substance? first substance second substance A CH3CH2CH2OH CH3CH2CH2CH2OH B I2 HCl C CH3CH2NHCH3 CH3CH2OCH3 D CH3CO2H CH3CH2OH

4 © VJC 2022 9729/01/Promo2022 7 Sodium hydrogen carbonate, NaHCO3, can be prepared from sodium sulfide, Na2S by the following reactions: Na2S(s) + CaCO3(s) → CaS(s) + Na2CO3(s) Na2CO3(s) + H2O(l) + CO2(g) → 2NaHCO3(s) Assuming that the percentage yield in each step is identical, 20.5 kg of sodium hydrogen carbonate (Mr = 84.0) was formed from 50 kg of sodium sulfide (Mr = 78.1). What is the percentage yield of each step? A 13.8% B 43.7% C 61.8% D 70.7% 8 Incomplete combustion of w dm3 of butane, C4H10, yielded a mixture of carbon dioxide and carbon monoxide in the ratio of 3:1, together with water vapour. What is the volume of oxygen consumed? A 5w dm3 B 6w dm3 C 9w dm3 D 12w dm3 9 In the body, cellular respiration produces energy from the oxidation of glucose. The diagram shows the structure of glucose. A new artificial sweetener has been produced by replacing all of the alcohol groups attached directly to the ring carbon atoms in glucose with chlorine atoms. What is the empirical formula of this chlorinated glucose? A CHClO B CH2Cl C C3H4Cl2O D C6H7Cl5O

5 © VJC 2022 9729/01/Promo2022 [Turn Over 10 0.5 g of zinc powder was found to re duce an acidified solution of 10.2 cm3 of 0.500 mol dm–3 VO2+. What is the reduced product of VO2+? A V2+ B V3+ C VO2+ D VO3– 11 Some enthalpy changes of combustion are given below. What is the enthalpy change of the following reaction? CO(g) + 2H2(g) → CH3OH(l) Hc / kJ mol−1 CO(g) + 2 1 O2(g) → CO2(g) −283 H2(g) + 2 1 O2(g) → H2O(l) −286 CH3OH(l) + 2 3 O2(g) → CO2(g) + 2H2O(l) −715 A −146 B −140 C +140 D +146 12 Use of the Data Booklet is relevant to this question. Given the following data: Lattice energy of magnesium chloride –2526 kJ mol–1 Standard enthalpy change of hydration of chloride ion –384 kJ mol–1 Standard enthalpy change of hydration of magnesium ion –1890 kJ mol–1 What would be the change in temperature measured when 2.00 g of magnesium chloride was dissolved in 50 g of water? [Molar mass of MgCl2 = 95.3 g mol−1] A +12.7 C B +13.3 C C +24.3 C D +25.3 C

6 © VJC 2022 9729/01/Promo2022 13 Some ∆Hf values are given below. compound ∆Hf / kJ mol−1 H2O(l) −286 CO2(g) −394 C6H12O6(s) −1273 The overall reaction in photosynthesis can be represented by the following equation. 6CO2(g) + 6H2O(l) → C6H12O6(s) + 6O2(g) Which of the following statements are correct? 1 The enthalpy change of the reaction is +2807 kJ mol−1. 2 In the formation of products, the system becomes less disordered. 3 The reaction is not spontaneous at all temperatures. A 1, 2 and 3 C 2 and 3 only B 1 and 2 only D 3 only

7 © VJC 2022 9729/01/Promo2022 [Turn Over 14 A dilute solution of hydrogen peroxide decomposes slowly in aqueous solution according to the following equation: 2H2O2(aq) → 2H2O(l) + O2(g) A solution with an original concentration of 3.00 mol dm-3 was placed in a bottle contaminated with transition metal ions, which act as catalyst for the decomposition. The rate of decomposition was measured by withdrawing 10.0 cm3 portion at various times and titrating with acidified 0.05 mol dm-3 KMnO4(aq). The following results were obtained. How long has the solution in the bottle been contaminated before the first portion was withdrawn for titration? Assume that 5 mol of H2O2 reacts with 2 mol of KMnO4. A 14 min C 42 min B 28 min D 84 min 0 5 10 15 20 25 30 0 5 10 15 20 25 30 Volume of KMnO4(aq) / cm3 Time / min

8 © VJC 2022 9729/01/Promo2022 15 The rates of chemical reactions can often be increased by increasing the concentration of reactants or raising the temperature. Which statements are correct? 1 Increasing the concentration increases the rate constant. 2 Increasing the concentration increases the proportion of particles having energy greater than the activation energy. 3 Increasing the temperature increases the rate constant. 4 Increasing the temperature increases the proportion of particles having energy greater than the activation energy. A 1, 3 and 4 only C 2, 3 and 4 only B 1 and 2 only D 3 and 4 only 16 A reaction between NO and H2 has the following suggested mechani