2022 ESSS Chem Prelims P1

CHEMISTRY 6092/01 Paper 1 Multiple Choice Tuesday 1 hour 13 September 2022 0800 – 0900 Additional Materials: Multiple Choice Answer Sheet ___________________________________________________________________ READ THESE INSTRUCTIONS FIRST This question booklet consists of 16 printed pages including the cover page. East Spring Secondary School Towards Excellence and Success Preliminary Examination 2022 Secondary 4 Express Name: …………………………………………………………………………………….… ( ) Class: ……………… Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class, index number 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 16. The use of an approved scientific calculation is expected, where appropriate. ���

2 1 Gas X is very soluble in water, less dense than air, and turns moist red litmus paper blue. Which method would be most suitable to collect a dry sample of the gas? A B C D 2 A gas, T, has the following properties: 1 a choking smell 2 turns damp blue litmus paper red, then bleaches it 3 does not decolourise acidified potassium manganate(VII) What is T? A ammonia B chlorine C carbon dioxide D sulfur dioxide X dry X dry X water calcium oxide calcium oxide dry X dry X X X X concentrated sulfuric acid ���

3 3 Two students investigated the substances that produce the colour in a type of sweet. The solution obtained from the sweet was separated by paper chromatography. The chromatograms obtained by the two students are shown below. student 1 student 2 Why are the two chromatograms obtained different? A The two students used different solvents. B One of the students did not use enough solvent. C The solvent for student 2 did not reach the top of the paper. D The solvent moved up the paper at different speeds. 4 A student was provided with a solid mixture, M. The table below shows some information about the three substances found in mixture M. substance boiling point / °C solubility in water W 140 soluble X 90 insoluble Y 95 soluble The student was told he could carry out some of the fo