ATTENTION:
Kindly note that you will be presented with 50 questions randomized from the NOUN question bank. Make sure to take the quiz multiple times so you can get familiar with the questions and answers, as new questions are randomized in each attempt.
Good luck!
CHM192
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1) A simple oil bath can be made by heating a _________ of oil on a hot plate.
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2) Sodium metal _________ on contact with water.
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3) _________ is the container used to keep sample dry.
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4) The shrinkage of a solid being heated is called _____.
5 / 50
5) Precision and _________ were still missing with the use of spring balance.
6 / 50
6) Powerful pumps provide good heat __________ and optimum temperature accuracy.
7 / 50
7) The most common methods of lighting the burner are using a match on a ___________ lighter.
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8) __________ flasks are used to prepare solution of a specific concentration.
9 / 50
9) Elimination of a molecule of water in alcohol results in Pi-bond formation of _________
10 / 50
10) In the reaction of KMnO4 and ethene, the KMnO4 is ________
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11) Cyclic hydrocarbons are aliphatic compound that have carbon atoms linked _________
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12) Most laboratory __________ are equipped with multiple gas nozzles connected to a central gas source.
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13) ________ are used to heat small quantities of substances to very high temperatures.
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14) To write the ______________ formula of hydrocarbon, the hydrogen atoms are grouped with their carbon atom.
15 / 50
15) A Bunsen burner was named after _________ Bunsen.
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16) Aqueous ammonia should be used only in the ________ hood.
17 / 50
17) A medicine dropper is calibrated by counting the number of drops it produces to make up a ________
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18) When alcohol is dehydrated, product x is formed. To prevent x from reforming back to alcohol, x is preferably removed by _________
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19) For micro-scale work, a Pasteur dropping ___________ can be used instead of glass funnel.
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20) In the laboratory, the most common measuring instrument is _________
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21) Elimination reaction of an alcohol is called _________
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22) The two types of magnetic stirrers are mechanical and _________
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23) Which of the following reactions (1) substitution (2) addition (3) reaction with sulphuric acid, is/are not common to alkanes?
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24) All edges of glass tubing must be fine-polished to round off the ________ edges.
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25) The _________ of a solid is the temperature at which the liquid and solid phases are in equilibrium.
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26) Bunsen burner is used for heating, sterilization and ________
27 / 50
27) Modern digital weighing scales __________ results very precisely.
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28) Which of these; ethanol and methanol, has higher boiling point and why?
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29) For temperature above 100oC, __________ baths are generally used
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30) Hydrocarbons consisting of carbon linked in a single chain are chain aliphatic, those linked by branched chain are called ________
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31) Proper selection of a suitable type of stirrer requires that you certain ________ variables.
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32) One of the reasons for the vast array of organic compounds is the phenomenon of ____________.
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33) Supercooling occurs when a liquid is cooled __________ its freezing point.
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34) The simplest formular for representing hydrocarbon is called __________ formular.
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35) When heating beakers with a burner, _________ should be placed between the vessel and the flame.
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36) NaOH is ________ and can eat away living tissues.
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37) Alkanes are saturated hydrocarbons, cycloalkanes are ____________ hydrocarbons.
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38) Modern digital weighing scales have many types, styles and _________ ranges.
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39) Filtration involves the separation of __________ solid materials from a liquid.
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40) Isomers have different physical properties and _________ chemical properties.
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41) When liquid is cooled less than its freezing point, it _________ .
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42) Some solids begin to ___________ a few degrees below their melting point.
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43) The heating mantle is safe because it does not produce _________
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44) BrCH2CH2Br represent _________.
45 / 50
45) The viscosity of most liquids varies _________ with temperature.
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46) Never place the litmus paper _________ into the solution.
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47) __________ is the process of boiling reactants while cooling the vapour and returning it to the flask as liquid.
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48) Calcium chloride is mostly used as _____.
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49) The size of steam bath can be controlled by adding or removing ___________
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50) Heating mantles must be used with variable _______
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