Category: CHM192 0 CHM192 1 / 50 Which of the following reactions (1) substitution (2) addition (3) reaction with sulphuric acid, is/are not common to alkanes? 1&3 2&3 1,2&3 1&2 2 / 50 Proper selection of a suitable type of stirrer requires that you certain ________ variables. Check 3 / 50 Bunsen burner is used for heating, sterilization and ________ Check 4 / 50 BrCH2CH2Br represent _________. 1,4- dibromoethane 2,3- dibromoethane 1,2- dibromoethane 1,1- dibromoethane 5 / 50 Precision and _________ were still missing with the use of spring balance. Check 6 / 50 Aqueous ammonia should be used only in the ________ hood. Check 7 / 50 One of the reasons for the vast array of organic compounds is the phenomenon of ____________. Allotropy Azeotropes Isomerism Carbonation 8 / 50 All edges of glass tubing must be fine-polished to round off the ________ edges. Check 9 / 50 _________ is the container used to keep sample dry. Check 10 / 50 A stirrer hot plate keeps the _________ at a constant temperature while stirring. Check 11 / 50 Which of these; ethanol and methanol, has higher boiling point and why? Ethanol, it is polar Methanol, it is non-polar Ethanol, it has higher molecular mass Methanol, has lower molecular mass 12 / 50 To write the ______________ formula of hydrocarbon, the hydrogen atoms are grouped with their carbon atom. skeletal condensed emperical structural 13 / 50 Heating mantles must be used with variable _______ Check 14 / 50 Hydrocarbons consisting of carbon linked in a single chain are chain aliphatic, those linked by branched chain are called ________ Branched aliphatic Cyclic hydrocarbon Cyclic aliphatic Chain aliphatic 15 / 50 The heating mantle is safe because it does not produce _________ Check 16 / 50 Most laboratory __________ are equipped with multiple gas nozzles connected to a central gas source. Check 17 / 50 The simplest formular for representing hydrocarbon is called __________ formular. molecular structural homologous emperical 18 / 50 In the laboratory, the most common measuring instrument is _________ Graduated cylinder Burette Volumetric flask Volumetric beaker 19 / 50 The size of steam bath can be controlled by adding or removing ___________ Check 20 / 50 Below the _________ point, solvent will be seen running back into the flask. Check 21 / 50 When heating beakers with a burner, _________ should be placed between the vessel and the flame. Check 22 / 50 A Bunsen burner was named after _________ Bunsen. Check 23 / 50 Bromine water is reacted with I. Butane II. Butene III. Butyne. In which of the/these reactions will bromine water be decolourised? I,II I and III II,III I,II,III 24 / 50 The two types of magnetic stirrers are mechanical and _________ Check 25 / 50 The viscosity of most liquids varies _________ with temperature. Check 26 / 50 ________ are used to heat small quantities of substances to very high temperatures. Check 27 / 50 Calcium chloride is mostly used as _____. Dehydrating agent Reducing agent Drying agent Emulsifying agent 28 / 50 The most common methods of lighting the burner are using a match on a ___________ lighter. Check 29 / 50 When alcohol is dehydrated, product x is formed. To prevent x from reforming back to alcohol, x is preferably removed by _________ filtration distillation decantation crystallization 30 / 50 NaOH is ________ and can eat away living tissues. Check 31 / 50 The shrinkage of a solid being heated is called _____. sintering recoiling entectic contraction 32 / 50 When liquid is cooled less than its freezing point, it _________ . Does not melt Does not solidify does solidify expands 33 / 50 For temperature above 100oC, __________ baths are generally used Check 34 / 50 Never place the litmus paper _________ into the solution. Check 35 / 50 Modern digital weighing scales __________ results very precisely. Check 36 / 50 A medicine dropper is calibrated by counting the number of drops it produces to make up a ________ Check 37 / 50 Sodium metal _________ on contact with water. Check 38 / 50 Filtration involves the separation of __________ solid materials from a liquid. Check 39 / 50 A simple oil bath can be made by heating a _________ of oil on a hot plate. Check 40 / 50 The most important applications of magnetic stirring is stirring in a ________ system. Check 41 / 50 In the reaction of KMnO4 and ethene, the KMnO4 is ________ reduced hydrolysed neutralized oxidized 42 / 50 Powerful pumps provide good heat __________ and optimum temperature accuracy. Check 43 / 50 Alkanes are saturated hydrocarbons, cycloalkanes are ____________ hydrocarbons. None of the above unsaturated Straight chain saturated 44 / 50 Elimination reaction of an alcohol is called _________ dehydration catalysis substitution addition 45 / 50 Cyclic hydrocarbons are aliphatic compound that have carbon atoms linked _________ By branch In a circle In a closed polygon Without ring 46 / 50 Modern digital weighing scales have many types, styles and _________ ranges. Check 47 / 50 Supercooling occurs when a liquid is cooled __________ its freezing point. to above within below 48 / 50 Some solids begin to ___________ a few degrees below their melting point. expand decompose sweat sublime 49 / 50 __________ is the process of boiling reactants while cooling the vapour and returning it to the flask as liquid. Check 50 / 50 __________ flasks are used to prepare solution of a specific concentration. Check Restart quiz Rate this quiz Send feedback
