2024 H1 Prelim Paper 1_HCI

This document consists of 9 printed pages and 1 blank page. © Hwa Chong Institution 8873/01/Prelim 2024 [Turn over HWA CHONG INSTITUTION C2 Preliminary Examination Higher 1 CANDIDATE NAME CT GROUP 23S CENTRE NUMBER INDEX NUMBER CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Data Booklet 8873/01 16 September 2024 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid or tape. Write your name and CT group in the space provided at the top of this page. Complete the information on the Answer Sheet as shown below. 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. 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.

2 © Hwa Chong Institution 8873/01/Prelim 2024 [Turn over 1 Use of the Data Booklet is relevant to this question. Which species has one unpaired electron? A Li+ B P C Cl D Cu+ 2 Use of the Data Booklet is relevant to this question. The mineral pyrite contains sulfur and iron. A sample of pyrite was analysed and four different types of atom were identified; V, W, X and Y. Table 1.1 shows information about the four types of atom found in the sample. Table 1.1 Atom relative mass relative % abundance V 31.97 63.8 W 33.97 2.8 X 53.94 31.4 Y 55.95 2.0 What is the relative atomic mass of sulfur in this sample? A 21.35 B 32.05 C 39.04 D 54.06 3 A substance, Z, has the following properties. • melting point –39 °C • boiling point 357 °C • insoluble in water • conducts electricity when solid and when molten What is the structure of Z? A giant molecular B ionic C metallic D simple molecular 4 What happens as ice melts at 0°C? 1 Molecules gain kinetic energy and temperature increases. 2 Energy is gained to overcome the hydrogen bonds between molecules. 3 Molecules gain sufficient energy to move from fixed positions. A 1 only B 1 and 2 only C 1 and 3 only D 2 and 3 only

3 © Hwa Chong Institution 8873/01/Prelim 2024 [Turn over 5 Which compound has the highest boiling point? A CH3CH2F B CH3CH2OH C CH3CHO D CH3OCH3 6 Ethene is the monomer of the polymer, poly(ethene). How do the carbon-carbon bond length and the H–C–H bond angle in ethene compare with that in poly(ethene)? carbon-carbon bond length is H–C–H bond angle is A longer in ethene larger in ethene B longer in ethene smaller in ethene C shorter in ethene larger in ethene D shorter in ethene smaller in ethen