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