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