2022 Peirce Chemistry P1

Class Register No. Candidate Name PEIRCE SECONDARY SCHOOL PRELIMINARY EXAMINATION 2022 SECONDARY 4 EXPRESS / 5 NORMAL ACADEMIC SCIENCE (CHEMISTRY/BIOLOGY) 5078/01 Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Periodic Table 31 AUGUST 2022 1 hour INSTRUCTIONS TO CANDIDATES Write in soft pencil. Do not use paper clips, highlighters, glue or correction fluid. Write your name, register number and class on the Multiple Choice 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 Multiple Choice Answer Sheet. A copy of the Data Sheet is printed on page 18 . Read the instructions on the Multiple Choice 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 paper. This paper consists of 18 printed pages and 1 blank page. Setter: Ms Thenmozhi and Miss Pang Yin Yin

2 1 Which statement provides the best evidence for diffusion? A Aroma of cooking travels from kitchen to all parts of the house. B Solid dry ice changes to gas at room temperature. C Water boils at a higher temperature when salt is added. D Wet clothes dry quickly in the hot day. 2 Two methods of collecting gas G are shown. Which properties of gas G are shown by these collection methods? density of gas G solubility of gas G in water A denser than air insoluble B denser than air soluble C less dense than air insoluble D less dense than air soluble 3 Reagents are added to solutions of four different ions. Which reaction does not produce a gas? ion reagents added A CO32-(aq) dilute hydrochloric acid B NH4+(aq) aqueous sodium hydroxide C NO3-(aq) aluminium foil and aqueous sodium hydroxide,warm D SO42-(aq) dilute nitric acid and aqueous barium nitrate,warm

3 4 Substance Q is a yellow substance that is insoluble in water. It has a melting point of 115 oC and boiling point of 446 oC. Which method would be suitable for separating Q from a mixture of Q and water? A crystallisation B distillation C filtration D fractional distillation 5 Which statement is true? A A fluoride ion has more electrons than a sodium ion. B An iron (III) ion is formed by an iron atom gaining 3 electrons. C A neon atom has more electrons than a fluoride ion. D A magnesium atom has more electrons than a magnesium ion. 6 An element X has 3 electrons in its outermost shell. What should be the chemical formula of the sulfate of element X? A X