NYGH 2018-S3MYE-IP Chem

Class Register Number Name NANYANG GIRLS' HIGH SCHOOL Mid-Year Examination 2018 Secondary Three IP Chemistry CHEMISTRY 1 hour 30 minutes Monday 7 May 2018 0845 - 1015 READ THESE INSTRUCTIONS FIRST Write your class, register number and name in the spaces at the top of this page. Do not use paper clips, glue or correction fluid. There are 3 sections in this paper. Section A 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 the Multiple-Choice Answer Sheet provided. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Section B and C Answer all questions. The number of marks is given in brackets [ ] at the end of each question or part question. Candidates are reminded that all quantitative answers should include appropriate units. The use of an approved scientific calculator is expected, where appropriate. Candidates are advised to show all their working in a clear and orderly manner. A copy of the Periodic Table is on page 18. Section A (20 marks) Section B (30 marks) Section C (10 marks) Total (60 marks) Setter: KXY, NHK, CT This document consists of 18 printed pages. NANYANG GIRLS' HIGH SCHOOL [Turn over

2018 Mid-Year Examination Secondary Three IP Chemistry 2 Nanyang Girls’ High School Setter: KXY, NHK, CT 1 Which of the following is not a factor affecting rate of diffusion? A concentration gradient B relative molecular mass C temperature D volume 2 Below is a table showing the melting and boiling points of two metals, gallium and mercury. Both metals have been used in thermometers. metal melting point/ °C boiling point/ °C gallium 29.8 2400.0 mercury –38.8 356.7 Which of the following describes the movement of their metal atoms at 20.0 °C? gallium mercury A vibrate about fixed positions vibrate about fixed positions B vibrate about fixed positions slide across neighbouring atoms C slide across neighbouring atoms slide across neighbouring atoms D slide across neighbouring atoms move randomly in all directions 3 There are three methods to collect gases: I upward delivery II downward delivery III displacement of water When magnesium metal is placed in a solution of hydrochloric acid, which method(s) could be used to collect the gas produced? A I only B II only C I and II only D I and III only Section A Answer all questions. Choose the answer you consider correct and record your choice in the Multiple-Choice Answer Sheet provided.

2018 Mid-Year Examination Secondary Three IP Chemistry 3 Nanyang Girls’ High School Setter: KXY, NHK, CT [Turn Over] 4 Which of the following is the best drying agent to obtain a dry sample of ammonia gas? A concentrated sulfuric acid B solid calcium oxide C solid calcium carbonate D sodium hydroxide 5 50 cm3 of distilled water was added to 50 cm3 of 1 mol dm–3 of sulfuric acid. Which