CHM192

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

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

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

4) The viscosity of most liquids varies _________ with temperature.

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

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

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

8) Elimination reaction of an alcohol is called _________

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

32) BrCH2CH2Br represent _________.

33) Heating mantles must be used with variable _______

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

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

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

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

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

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

40) Modern digital weighing scales __________ results very precisely.

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

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

43) A Bunsen burner was named after _________ Bunsen.

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

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

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

47) Sodium metal _________ on contact with water.

48) Calcium chloride is mostly used as _____.

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

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