SJI_2020 Year 3 EOY Chemistry 6092 P1

ST JOSEPH’S INSTITUTION END-OF-YEAR EXAMINATION 2020 (YEAR 3) CANDIDATE NAME CLASS INDEX NUMBER CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 6092 / 01 8 OCTOBER 2020 45 minutes (0800 - 0845) READ THESE INSTRUCTIONS FIRST Write your name, class and index number on the cover page of this Question Paper. Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. There are thirty 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. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done on this question paper. The use of an approved scientific calculator is expected, where appropriate. A copy of the Periodic Table is printed on page 2. This document consists of 16 printed pages including this cover page.

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3 1 The diagram shows a beaker filled with hydrogen gas inverted over a porous pot containing carbon monoxide. The water level on the right hand side of the U-tube moves. Which of the following statements is not true? A Hydrogen diffuses into the pot faster than carbon monoxide diffuses out of the pot. B The pressure in the pot increases and then decreases. C The water level goes back to the original level at the end of the experiment. D The water level on the right hand side of the U-tube drops and then rises. hydrogen

4 2 A beaker of pure water has been boiling for 20 minutes. Which of the following diagrams represent s the particles present in the bubbles inside the boiling water? represents a hydrogen atom and represents an oxygen atom 3 The boiling points of some elements are given in the table. element boiling point / ⁰C X -138 Y -155 Z -143 A mixture of elements X, Y and Z is heated from -162 ⁰C to -142 ⁰C. Which of the elements would remain in the liquid state at -142 ⁰C? A X only B X and Y only C Y and Z only D X, Y and Z A B C D (EMPTY SPACE)

5 4 Zinc sulfate can be separated from chalk using four processes. Which is the correct order for separation to take place? A dissolving, evaporation, crystallisation, filtration B dissolving, filtration, evaporation, crystallisation C filtration, crystallisation, evaporation, dissolving D filtration, evaporation, crystallisation, dissolving 5 Which condition must be satisfied for separation of substances to occur in paper