VJC JC2 H1 Prelim P1 QP

1 © VJC 2025 8873/01/PRELIM/25 [Turn over VICTORIA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION Higher 1 CHEMISTRY 8873/01 Paper 1 Multiple Choice 19 September 2025 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 name and CT group on the Answer Sheet. 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. 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 10 printed pages.

2 © VJC 2025 8873/01/PRELIM/25 For each question there are four possible answers, A, B, C, and D. Choose the one you consider to be correct. 1 9Be is used in the production of ‘fast neutrons’. How many neutrons are present in 0.09 g of 9Be? [L = Avogadro constant] A 0.04 L B 0.05 L C 0.09 L D 0.45 L 2 The table below shows the fifth, sixth, seventh, eighth and ninth ionisation energies of elements L and M in kJ mol–1. Elements L and M are found in period 3. 5th 6th 7th 8th 9th L 6270 21300 25400 29900 35900 M 6540 9360 11000 33600 38600 Given that all the atoms have at least an octet configuration, what could not be the formula of the compound formed by these two elements? A LM5 B LM4+ C LM3 D LM2 3 The diagram shows the structure of a pyruvic acid. pyruvic acid What set of bond angles are present in pyruvic acid? A 120o, 109o, 105o B 120o, 105o, 90o C 180o, 120o, 109o D 180o, 120o, 90o

3 © VJC 2025 8873/01/PRELIM/25 [Turn over 4 Which statements about water are due to its ability to form hydrogen bonds? 1 Liquid water is denser than ice. 2 Water has a significantly higher boiling point than methane , CH 4, even though both compounds have similar relative molecular masses. 3 The high surface tension of water enables some insects to walk on the surface of the ponds. A 1, 2 and 3 B 1 and 2 only C 2 and 3 only D 1 and 3 only 5 Synthetic rubber is commonly produced from the monomer buta-1,3-diene. buta-1,3-diene What are the numbers of σ and 𝜋 bonds present in one molecule of buta-1,