2022 NYGH Chem Prelims P1

Class Centre/Index Number Name Preliminary Examination 2022 Secondary 4 CHEMISTRY Paper 1 Multiple Choice 6092/01 1 hour Friday 26 August 1200 – 1300 Additional materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue, correction fluid or tape. Write your name, register number and class in the spaces at the top of this page and on the Answer Sheet in the spaces provided. 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 15. The use of an approved scientific calculator is expected, where appropriate. This document consists of 15 printed pages and 1 blank page. Setter(s): FKD NANYANG GIRLS' HIGH SCHOOL [Turn over ���

2 1 Which apparatus would be most suitable for measuring 24.5 cm3 of a liquid? A burette B measuring cylinder C pipette D syringe 2 The diagram shows an experimental setup to produce and collect a dry sample of gas X. Which of the following is most likely to be gas X? A ammonia gas B hydrogen gas C hydrogen chloride gas D steam 3 Which is not correctly matched with the apparatus needed for each separation? separation apparatus A oil from a mixture of oil and water separating funnel B salt from a mixture of salt and sand filter paper, filter funnel, evaporating dish, retort stand, Bunsen burner C blue dye from black ink filter paper, beaker, lid D water from seawater thermometer, fractionating column, condenser gas X concentrated sulfuric acid ���

3 [Turn over 4 The graph shows the solubility curve of potassium nitrate in water. Potassium nitrate solid was dissolved in 400 g of water at 45°C to obtain a saturated solution. Upon cooling the solution to room temperature (25°C), what is the maximum approximate mass of crystals that can be obtained? A 113 g B 138 g C 452 g D 552 g 5 Which of the following tests would be able to distinguish between sulfur dioxide and carbon dioxide gas? 1 Bubble the gas into a test tube containing aqueous acidified KMnO4. 2 Bubble the gas into a test tube containing limewater. 3 Place a damp blue litmus paper over the gas. 4 Place a lighted splint over the gas. A 1 only B 1 and 2 C 1 and 3 D 2 and 4 0 10 20 30 40 50 temperature / °C 250 200 150 100 50 0 solubility / g per 100 g of water ���

4 6 A student carried out an experiment, at room temperature, involvin