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