2023 VJC H2 Chem Prelim P1 (QP)

©VJC 2023 9729/01/PRELIM/2023 [Turn Over VICTORIA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION Higher 2 CHEMISTRY 9729/01 Paper 1 Multiple Choice 22 September 2023 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 11 printed pages.

©VJC 2023 9729/01/PRELIM/2023 2 For each question there are four possible answers, A, B, C, and D. Choose the one you consider to be correct. 1 In which species are the numbers of protons, neutrons and electrons all different? A Al13 27 B Cl– 17 35 C S2– 16 32 D K+ 19 39 2 Dicarbon monoxide, C 2O, is found in dust clouds in space. Analysis of it shows that the central carbon atom is sp hybridised and there are no unpaired electrons. How many lone pairs of electrons are present in a molecule of C2O? A 1 B 2 C 3 D 6 3 Which diagrams represent part of a giant molecular structure? 1 ● = C 2 ● = C 3 ● = Na ○ = Cl 4 ● = I2 A 1, 2 and 3 only C 2, 3 and 4 only B 1 and 2 only D 3 and 4 only

©VJC 2023 9729/01/Prelim/2023 [Turn Over 3 4 Three identical flasks each contains the same mass of gases E, F and G respectively. The temperature and pressure of each flask are indicated below. Gas E F G Temperature / K t t 2t Pressure / Pa p 2p p Assuming ideal gas behaviour, which of the following is a correct representation of the relative molecular masses of the three gases? A Mr(G) > Mr(F) > Mr(E) C Mr(G) > Mr(E) > Mr(F) B Mr(E) > Mr(F) > Mr(G) D Mr(F) > Mr(E) > Mr(G) 5 Which of the following explains the non-ideal behaviour of the ga