2024 YIJC JC2 H1 CHEM PE P1 (Student_s Copy)

©YIJC [Turn over YISHUN INNOVA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION Higher 1 CANDIDATE NAME CG H1 GROUP 1 / 2 / 3 CHEMISTRY Paper 1 Additional Materials: Multiple Choice Answer Sheet Data Booklet 8873 /01 13 September 2024 1 hour READ THESE INSTRUCTIONS FIRST This document consists of 12 printed pages and 4 blank pages. Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name and class in the spaces at the top of this page and on the Answer Sheet in the spaces provided unless this has been done for you. 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.

©YIJC [Turn over 2 1 Which of the species in their gaseous state shown below will be deflected by the smallest angle in an electric field? A 1H2 B 4He2+ C 9Be2+ D 11B3+ 2 What is the electronic configuration of vanadium, 23V? A 1s2 2s2 2p6 3s2 3p6 3d4 4s1 B 1s2 2s2 2p6 3s2 3p6 3d5 C 1s2 2s2 2p6 3s2 3p6 4s2 4p3 D 1s2 2s2 2p6 3s2 3p6 3d3 4s2 3 Use of the Data Booklet is relevant to this question. How many atoms of gold, 79Au, are there in a pure gold coin with a mass of 3.94 g? A 1.20 × 1021 B 2.00 × 1021 C 1.20 × 1022 D 2.00 × 1022 4 10 cm3 of gaseous hydrocarbon is burnt completely in 70 cm3 of oxygen. When cooled to room temperature, the gaseous volume was 50 cm3. A further decrease of 40 cm3 in the gaseous volume was observed when the gaseous mixture is passed through aqueous potassium hydroxide. What is the molecular formula of the hydrocarbon? A C2H6 B C3H8 C C4H8 D C5H12 5 A student added 12.5 cm3 of 0.0500 mol dm–3 sodium hydroxide to 25.0 cm3 of 0.100 mol dm–3 hydrochloric acid. What is the concentration of hydrochloric acid remaining in the reaction mixture? A 0.0333 mol dm–3 B 0.0500 mol dm–3 C 0.066 mol dm–3 D 0.0750 mol dm–3

©YIJC [Turn over 3 6 Substance T • is soluble in polar solvent. • does not conduct electricity in solid but conducts electricity when molten. • is a solid at room temperature. What could be the structure of T? A giant molecular B giant ionic C giant metallic D simple molecular 7 Hydrazine, N2H4, has some