TMA2/CHM192

My TMA Home TMA Results My Pending TMA Quick Help TMA Quiz Questions TMA: TMA2/CHM192 Matric Number:  SCORE=10.00 CHM192 - Introductory Chemistry Practical II Miss Abdul Modupe (mabdul@noun.edu.ng ) 1 Which of these actions is appropriate in the laboratory? Smoking Eating and Drinking Washing hands frequently Wearing contact lenses 2 When measuring a liquid, you use a_________, and you should also put it on a flat surface and get at _________ level to read it properly. Beaker, Desk Triple beam balance, Elevated Graduated cylinder, Eye Balance, Eye 3 Which of these funnels is used in suction filtration? Buchner funnel Filter funnel Long stem funnel Separatory funnel 4 Which of the following is NOT a laboratory accident? Cut Heat burn Malaria Chemical burn 5 The best time to clean glass wares is ___________. During its use Anytime The first time it is bought only Immediately after its use 6 ______________ is an example of a laboratory dessicant. Silica gel Oxygen Ammonia Carbonmonoxide 7 What should you do if a chemical gets into your eye? Neutralize with base Rub hands over your eyes Flush it with gently flowing water None of the above 8 The following methods can be used to separate liquids and solids EXCEPT Decanting Filtration Centrifugation Distillation 9 Which of the following is used to separate two immiscible liquids? Buchner funnel Filter flask Conical flask Separatory funnel 10 The best way to read the meniscus is ______________. Upper meniscus at desk level Lower meniscus at desk level Lower meniscus at eye level Upper meniscus at eye level 11 A dessicator is used to ___________. store samples dry samples test samples weigh samples 12 Which of these can be used to measure mass? Conical flask kilo machine Dessicator Balance 13 What is the best treatment for a serious burn? Wash in water Apply an ointment Apply a cold compress All of the above 14 The appropriate way to test gases for odour is ___________. Fan some of the vapour toward your nose Hold your nose directly over the containing vessel Breathe in and out None of the above 15 The following EXCEPT one will help to view the meniscus correctly. Dim lighting Proper lighting Eye level viewing White background 16 Which of the folowing dresses is inappropriate to wear in a laboratory? shirt with rolled up sleeves loose sleeves cloth lab coat rubber lab apron 17 Which of these flasks is useful in a distillation process? Round-bottom flask Erlenmeyer flask Filter flask Conical flask 18 Which of these laboratory apparatus may be used to crush solids into powder? Tongs Mortar and pestle Crucible Grinding machine 19 Which of these is useful in suction filtration set ups? Round-bottom flask Filter flask Beaker Evaporating dish 20 The S.I. unit for length is ___________. Inches Feet Metres Grams