Woodlands Prelim P2

6092/02/Prelim/24 EXPRESS EXPRESS EXPRESS Name: ........................................................................ ( ) Class: ................ WOODLANDS SECONDARY SCHOOL PRELIMINARY EXAMINATION 2024 Level: Secondary 4 Express Marks: 80 Subject: Pure Chemistry Day: Tuesday Paper: 6092/02 Date: 20 August 2024 Duration: 1 hour 45 minutes Time: 0750 – 0935 hours READ THESE INSTRUCTIONS FIRST Write your name, index number and class on all the work that you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Section A Answer all questions. Write your answers in the spaces provided. Section B Answer one question. Write your answers in the spaces provided. The number of marks is given in brackets [ ] at the end of each question or part question. A copy of the Periodic Table is printed on page 24. The use of an approved scientific calculator is expected, where appropriate. DO NOT TURN THE PAGE UNTIL YOU ARE TOLD TO DO SO. This document consists of 22 printed pages and 2 blank pages. FOR EXAMINER’S USE Section A Section B Total /70 /10 /80

2 6092/02/Prelim/24 EXPRESS EXPRESS EXPRESS BLANK PAGE

3 6092/02/Prelim/24 EXPRESS EXPRESS EXPRESS Section A Answer all questions. 1 Use the list of substances to answer the following questions. magnesium oxide silicon dioxide sulfur dioxide carbon monoxide zinc oxide carbon dioxide (a) Name all substances which are ionic compounds. ........................................................................................................................[1] (b) Which substance has a similar structure like diamond? ........................................................................................................................[1] (c) Which substance is an amphoteric oxide? ........................................................................................................................[1] (d) Which two substances can dissolve in water to form solutions with pH less than 7? ........................................................................................................................[1] (e) Which gaseous substance is neutral? ........................................................................................................................[1] [Total: 5]

4 6092/02/Prelim/24 EXPRESS EXPRESS EXPRESS 2 When ammonia gas reacts with hydrogen chloride gas, white fumes of ammonium