2023 KCPSS 6092 Prelim Chem P1, P2, MS

[Turn Over KUO CHUAN PRESBYTERIAN SECONDARY SCHOOL 2023 PRELIMINARY EXAMINATION Secondary 4 Express NAME CLASS REG. NO CHEMISTRY 6092 / 01 Paper 1 Multiple Choice 25 August 2023 1 hour Additional Materials: Multiple Choice Answer Sheet. Setter: Ms. Lim Zi Min READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and register number on the Answer Sheet in the spaces provided unless this has been done for you. There are forty 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. A copy of the Periodic Table is printed on page 16. The use of an approved scientific calculator is expected, where appropriate. This document consists of 16 printed pages including the cover page.

2 KCPSS 2023/Sec 4Exp Prelim Chem P1 [Turn Over Section A (40 marks) 1 The following shows the heating curve of ice. Which description in the table below best explains the respective section of the graph? section description A P to Q The particles are stationary and held in fixed positions B Q to R Heat energy taken in is used to overcome forces of attraction between particles. C R to S The volume of water is increasing as the particles expand and become larger. D T to U Water is boiling to form steam. 2 The apparatus shown below consists of a porous pot containing gas X which is surrounded by gas Y in a beaker. Which one of the following pairs of gases will cause an upward movement of the inert liquid at level Z? gas X gas Y A H2 O2 B CH4 H2 C C3H8 H2 D CO2 C3H8 temperature/°C time/min beaker porous pot U-tube containing an inert liquid Y X Z P Q R S T U

3 KCPSS 2023/Sec 4Exp Prelim Chem P1 [Turn Over 3 A student is given 250 cm3 of a saturated solution of sodium salt S and 500 cm3 of a saturated solution of potassium salt P in respective beakers . Both salts do not decompose on heating. Which of the following apparatus must she use in order to determine which salt is more soluble in water? 1 2 3 4 5 6 A 1, 2, 3 and 4 B 1, 4 and 6 C 1, 5 and 6 D 2, 4, 5 and 6 4 A student is provided with two drying agents, concentrated sulfuric acid and calcium oxide. Which method should he use to collect a sample of dry ammonia? [Mr: NH3, 17] A B C D calcium oxide dry ammonia moist ammonia concentrated sulfuric acid moist ammonia moist ammonia dry ammonia dry ammonia dry