CHM192




Category: CHM192

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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) The viscosity of most liquids varies _________ with temperature.

2 / 50

2) ________ are used to heat small quantities of substances to very high temperatures.

3 / 50

3) Heating mantles must be used with variable _______

4 / 50

4) Sodium metal _________ on contact with water.

5 / 50

5) __________ flasks are used to prepare solution of a specific concentration.

6 / 50

6) The size of steam bath can be controlled by adding or removing ___________

7 / 50

7) _________ is the container used to keep sample dry.

8 / 50

8) Filtration involves the separation of __________ solid materials from a liquid.

9 / 50

9) For micro-scale work, a Pasteur dropping ___________ can be used instead of glass funnel.

10 / 50

10) Modern digital weighing scales have many types, styles and _________ ranges.

11 / 50

11) For temperature above 100oC, __________ baths are generally used

12 / 50

12) To write the ______________ formula of hydrocarbon, the hydrogen atoms are grouped with their carbon atom.

13 / 50

13) Calcium chloride is mostly used as _____.

14 / 50

14) Isomers have different physical properties and _________ chemical properties.

15 / 50

15) The most important applications of magnetic  stirring is stirring in a ________ system.

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) Cyclic hydrocarbons are aliphatic compound that have carbon atoms linked _________

19 / 50

19) A simple oil bath can be made by heating a _________ of oil on a hot plate.

20 / 50

20) Bromine water is reacted with I. Butane II. Butene III. Butyne. In which of the/these reactions will bromine water be decolourised?

21 / 50

21) Alkanes are saturated hydrocarbons, cycloalkanes are ____________ hydrocarbons.

22 / 50

22) In the laboratory, the most common measuring instrument is _________

23 / 50

23) Never place the litmus paper _________ into the solution.

24 / 50

24) NaOH is ________ and can eat away living tissues.

25 / 50

25) In the reaction of KMnO4 and ethene, the KMnO4 is ________

26 / 50

26) A Bunsen burner was named after _________ Bunsen.

27 / 50

27) The shrinkage of a solid being heated is called _____.

28 / 50

28) The two types of magnetic stirrers are mechanical and _________

29 / 50

29) When heating beakers with a burner, _________ should be placed between the vessel and the flame.

30 / 50

30) When liquid is cooled less than its freezing point, it _________ .

31 / 50

31) The heating mantle is safe because it does not produce _________

32 / 50

32) Precision and _________ were still missing with the use of spring balance.

33 / 50

33) The most common methods of lighting the burner are using a match on a ___________ lighter.

34 / 50

34) The _________ of a solid is the temperature at which the liquid and solid phases are in equilibrium.

35 / 50

35) __________ is the process of boiling reactants while cooling the vapour and returning it to the flask as liquid.

36 / 50

36) When alcohol is dehydrated, product x is formed. To prevent x from reforming back to alcohol, x is preferably removed by _________

37 / 50

37) A stirrer hot plate keeps the _________ at a constant temperature while stirring.

38 / 50

38) One of the reasons for the vast array of organic compounds is the phenomenon of ____________.

39 / 50

39) Aqueous ammonia should be used only in the ________ hood.

40 / 50

40) Most laboratory __________ are equipped with multiple gas nozzles connected to a central gas source.

41 / 50

41) Which of these; ethanol and methanol, has higher boiling point and why?

42 / 50

42) All edges of glass tubing must be fine-polished to round off the ________ edges.

43 / 50

43) Elimination reaction of an alcohol is called _________

44 / 50

44) Hydrocarbons consisting of carbon linked in a single chain are chain aliphatic, those linked by branched chain are called ________

45 / 50

45) Below the _________ point, solvent will be seen running back into the flask.

46 / 50

46) Bunsen burner is used for heating, sterilization and ________

47 / 50

47) Proper selection of a suitable type of stirrer requires that you certain ________ variables.

48 / 50

48) A medicine dropper is calibrated by counting the number of drops it produces to make up a ________

49 / 50

49) Supercooling occurs when a liquid is cooled __________ its freezing point.

50 / 50

50) Powerful pumps provide good heat __________ and optimum temperature accuracy.

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