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