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