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