2022 NSS Chem Prelims P1

This document consists of 19 printed pages including the cover page and 1 blank page. NAME: CLASS: INDEX NO: READ THESE INSTRUCTIONS FIRST NORTHLAND SECONDARY SCHOOL PRELIMINARY EXAMINATION Secondary Four Express CHEMISTRY 6092/01 Paper 1 Multiple Choice 31 August 2022 Additional Materials: Multiple Choice Answer Sheet 1 hour Setter: Mdm Kumari Vetter: Mdm Nilasari Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your class, index number and name on the Answer Sheet in the spaces provided unless this has been done for you. There are forty questions in this section. 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 in this booklet. A copy of the Periodic Table is printed on page 19. The use of an approved scientific calculator is expected, where appropriate. SECTION FOR EXAMINER’S USE TOTAL 40 ���

Learners who Share, Citizens who Care, Leaders who Dare 2 1 The diagram shows apparatus used to obtain a gas sample from a mixture of nitrogen, carbon monoxide, carbon dioxide and ammonia. Which gases would be present in the gas sample? A carbon monoxide and ammonia only B carbon monoxide and carbon dioxide only C nitrogen and ammonia only D nitrogen and carbon dioxide only 2 A student is given 750 cm3 of a saturated solution containing a sodium salt S and 550 cm3 of a saturated solution containing a potassium salt P. Both salts do not decompose on heating. Which apparatus must she use to enable her to determine which salt is more soluble? A 1, 4 and 6 B 1, 5 and 6 C 1, 2, 3 and 4 D 2, 4, 5 and 6 aqueous potassium manganate(VII) concentrated sulfuric acid water gas sample 1 2 3 4 5 6 ���

Learners who Share, Citizens who Care, Leaders who Dare 3 3 The graph shows the changes in temperature when a mixture containing equal volumes of X (boiling point 78 °C) and Y (boiling point 108 °C) is heated and separated by fractional distillation. temperature / oC time / min Which section(s) describe(s) the concentration of vapours X and Y correctly? section concentration of vapours 1 equal X and Y in the distilling flask 2 more X than Y in the condenser 3 more X than Y in the conde