CHM192

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

2) The simplest formular for representing hydrocarbon is called __________ formular.

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

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

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

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

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

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

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

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

11) Modern digital weighing scales __________ results very precisely.

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

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

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

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

16) Calcium chloride is mostly used as _____.

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

18) BrCH2CH2Br represent _________.

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

20) A Bunsen burner was named after _________ Bunsen.

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

22) Elimination reaction of an alcohol is called _________

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

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

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

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

27) Some solids begin to ___________ a few degrees below their melting point.

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

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

30) Which of the following reactions (1) substitution (2) addition (3) reaction with sulphuric acid, is/are not common to alkanes?

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

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

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

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

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

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

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

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

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

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

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

42) Elimination of a molecule of water in alcohol results in Pi-bond formation of _________

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

44) Sodium metal _________ on contact with water.

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

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

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

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

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

50) Heating mantles must be used with variable _______