2022 LVSS Chem Prelims P1

LOYANG VIEW SECONDARY SCHOOL Preliminary Examination 2022 Secondary Four Express CANDIDATE NAME : ……………………………………………………………….......... CLASS : …………………. INDEX NUMBER : ……………. CHEMISTRY 6092/01 Paper 1 Multiple Choice 12 September 2022 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and index 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 17. The use of an approved scientific calculator is expected, where appropriate. Setter: Ms Imma Wong This paper consists of 17 printed pages. ���

2 1 Which group of substances consists of mixtures only? A air, petroleum and steel B nylon, glucose and ethanol C limestone, seawater and ozone D haematite, brass and sodium chloride 2 The graph (not drawn to scale) shows how the temperature of oxygen and nitrogen changes when they are heated. At which temperature will there be two different states of matter in a mixture of oxygen and nitrogen under similar conditions? A −180 oC B −200 oC C −215 oC D −220 oC 3 A balloon filled with gas X is placed inside a beaker that is filled with gas Y as shown. The balloon shrinks in size after a few hours. Which could be the identities of gases X and Y? X Y nitrogen ammonia ammonia argon argon oxygen oxygen nitrogen A B C D −183 −196 −210 −218 N2 O2 temperature / oC time / min after a few hours X Y balloon ���

3 4 An element J has a nucleon number of 45. The ion, J3+, contains 18 electrons. How many neutrons are there in an atom of J? A 18 B 21 C 24 D 45 5 Which statement describes the arrangement and movement of particles of sodium hydroxide in water? A Ions are closely packed and does not move. B Ions are widely spaced and move randomly. C Molecules are widely spaced and move randomly. D Molecules are closely packed and move randomly. 6 A stable molecule containing atoms of elements X, Y and Z has the structure shown. What could elements X, Y and Z be? X Y Z carbon sulfur hydrogen nitrogen silicon sulfur nitrogen silicon hydrogen silicon sulfur chlorine A B C D Y Y Y X X X Z Z Z ���

4 7 The structures of atoms of elements L and M are shown. L